Menu
6.5×47mm Lapua | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Type | Rifle | |||||||||||||||
Place of origin | Finland Switzerland | |||||||||||||||
Production history | ||||||||||||||||
Designer | Nammo Lapua Oy | |||||||||||||||
Manufacturer | Nammo Lapua Oy | |||||||||||||||
Produced | 2005–present | |||||||||||||||
Variants | 6-6.5×47 Lapua and Long Dasher | |||||||||||||||
Specifications | ||||||||||||||||
Bullet diameter | 6.71 mm (0.264 in) | |||||||||||||||
Neck diameter | 7.41 mm (0.292 in) | |||||||||||||||
Shoulder diameter | 11.59 mm (0.456 in) | |||||||||||||||
Base diameter | 11.95 mm (0.470 in) | |||||||||||||||
Rim diameter | 12.01 mm (0.473 in) | |||||||||||||||
Rim thickness | 1.37 mm (0.054 in) | |||||||||||||||
Case length | 47.00 mm (1.850 in) | |||||||||||||||
Overall length | 71.00 mm (2.795 in) | |||||||||||||||
Case capacity | 3.11 cm3 (48.0 gr H2O) | |||||||||||||||
Rifling twist | 200 mm (1-7.87') | |||||||||||||||
Primer type | Large rifle for prototypes, small rifle since start of production | |||||||||||||||
Maximum pressure (C.I.P.) | 435.00 MPa (63,091 psi) | |||||||||||||||
Ballistic performance | ||||||||||||||||
| ||||||||||||||||
Test barrel length: 27.5 Source(s): Lapua |
- Can anyone give me the trim to length and max length for 338 lapua. Just bought one, have everything to reload but I don't have any books with the data on case length.
- Testing The 6.5 x47 lapua. For testing the 6.5x47 Lapua, match-grade rifles were used, one a Model 70 Winchester and two others on Remington Model 40X actions. All three were equipped with match-grade triggers and target/varmint scopes with rigid, Picatinny mounting systems. I chose to go with barrels by Krieger, Criterion and E.R.
- Soon after Lapua released the 6.5×47 cartridge, clever wildcatters recognized the potential of a necked-down 6mm version of the case. The 6-6.5×47 has emerged as a great, do-it-all cartridge that has performed admirably in High Power competition, 600- and 1000-yard benchrest, tactical matches, and even F-Class.
The 6.5X47 Lapua likely gives a significant benefit even at 600 yards over the 6mmBR thanks to the external ballistics improvements in such a scenario. So, accurate and ballistically-efficient smaller cartridges that give long barrel life have a bright future and I think the 6.5X47 Lapua is going to be a key player in this role.
The 6.5×47mm Lapua (designated as the 6,5 × 47 Lapua by the C.I.P.)[1] is a smokeless powderrimless bottlenecked riflecartridge that was developed specifically for 300–1,000 m (328–1,094 yd) competition shooting by ammunition maker Nammo Lapua and the Swiss rifle manufacturer Grünig & Elmiger AG in 2005.[2] Other common names for this cartridge include 6.5×47mm.
Features[edit]
Thanks to the relatively long neck of the 6.5×47mm Lapua, it can be loaded with very long target bullets without placing the base of the bullet below the neck. This eliminates the 'donut problem' seen by many cases that get reloaded over 20 times. Left to right: Lapua FMJ 144gr, Hornady 123gr loaded to a COAL of 2.71in, and a Hornady 123gr A-Max.
The cartridge has many special features, including:[3]
- The cartridge chamber dimensions are optimized for target bullets.[4]
- High pressure level (435.00 MPa (63,091 psi) Pmax piezo pressure) and cartridge case capacity enables relative high velocity and flat trajectory.
- Reduced barrel wear[5] compared to 6mm Norma BR
- The 6.5×47mm Lapua has a base diameter and overall length similar to the 7.62×51mm NATO/.308 Winchester, allowing it to accept the same bolt heads and fit into similar short actions and magazines.
History[edit]
The 6.5×47mm Lapua has no direct parent case. It was designed by Lapua with a great deal of help from Swiss rifle manufacturer, Grünig & Elmiger.[4] The case also borrows many characteristics from the 6mm PPC[6] and has proven itself to be inherently accurate.[7]
Cartridge dimensions[edit]
The 6.5×47mm Lapua has 3.11 ml (48.0 grains H2O) cartridge case capacity.
6.5×47mm Lapua maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm).[1]
Americans would define the shoulder angle at alpha/2 = 30 degrees. The common rifling twist rate for this cartridge is 200 mm (1 in 7.87 in), 6 grooves, Ø lands = 6.50 mm (0.256 in), Ø grooves = 6.70 mm (0.264 in), land width = 2.29 mm (0.090 in), and the primer type is small rifle.[1]
According to the official C.I.P. (Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings the 6.5×47mm Lapua can handle up to 435.00 MPa (63,091 psi) Pmax piezo pressure. In C.I.P. regulated countries every rifle cartridge combo has to be proofed at 125% of this maximum C.I.P. pressure to certify for sale to consumers.This means that 6.5×47mm Lapua chambered arms in C.I.P. regulated countries are currently (2018) proof tested at 543.80 MPa (78,872 psi) PE piezo pressure.[1]
Performance[edit]
The 6.5×47mm Lapua is a medium power cartridge often compared to the .260 Remington and 6.5 Creedmoor.[8]It was designed from the beginning by Lapua to optimize accuracy, barrel life, and case capacity in a 6.5 mm cartridge for target and tactical shooting. As such it couples a sensible case volume (3.11 ml) to bore area (34.59 mm2/0.3459 cm2) ratio with ample space for loading relatively long slender projectiles that can provide good aerodynamic efficiency and external ballistic performance for the projectile diameter.[1] The 6.5×47mm Lapua offers slightly lower muzzle velocities than 6.5 mm/.260 cartridges such as the .260 Remington and 6.5 Creedmoor, because of its smaller case volume.[9] In an article by the Precision Rifle Blog a survey of the top 100 shooters in the precision rifle series (PRS) showed that the 6.5 Creedmoor was on average 50 ft/s (15 m/s) faster than the 6.5×47mm Lapua. Although the 6.5×47mm Lapua is said to have superior brass quality compared to the 6.5 Creedmoor.[10] The 6.5×47mm Lapua was the most popular cartridge during the PRS competition in 2015 beating out competing cartridges by more than two thirds.[11]
C.I.P. rules the 6.5×47mm Lapua and 6.5mm Creedmoor both at up to 435.00 MPa (63,091 psi) Pmax piezo pressure and the .260 Remington lower at up to 415.00 MPa (60,191 psi) Pmax piezo pressure.
Competitions[edit]
Competitively the 6.5×47mm Lapua has been setting many records, most of them at 600 yd (549 m). Erik Cortina broke a 300 yd (274 m) club record with 6.5×47 Lapua (RL17).[12] Cortina shot a 600-49X; the previous record was 599-32X. In the summer of 2016 Mike Gaizauskas shot a ten shot group measuring just 2.856 inches at 1,000 yd (914 m) beating out the record previously held by the 6mm Dasher.[13] American Kevin Nevius set a new NRA national record for high power rifle with a perfect score of 200-20X at 600 yd (549 m) – 20 shots (Prone-Any Sight). Nevius was using 6.5×47mm Lapua, 136 gr. Scenar-L OTM bullets, and VV N150 powder. The 6.5×47mm Lapua was also the dominant caliber in PRS in 2016, beating out all competing cartridges in the top ten tier, and dominated the other categories by more than two thirds.[11]
6.5 X47 Lapua Brass Trim Length Chart
The 6.5×47mm Lapua has become very popular with metallic silhouette shooters. The 2014 high NRA Nation Championship equipment survey lists the 6.5×47mm Lapua as second most popular caliber for both the high power rifle and high power hunter rifle competition.[14]
The 6.5×47mm Lapua has set a new record in October 2017 for bench rest in the UK with a five shot group measuring 1.058' and on a blustery day at 600 yd (549 m). The old record was 1.437'.[15]
Variants[edit]
Soon after the introduction of the 6.5×47mm Lapua, shooters were using the case as the basis for a new wildcat, by necking it down to 6 mm. This wildcat cartridge is often called a 6-6.5×47[16] to avoid confusing it with the 6×47 Swiss Match,[17] a similar case but with a large rifle primer. Another version that has been popular is a necked-down version with a 40-degree shoulder. PTG sells reamers for this and it has demonstrated a gain of about 100 fps over the standard 6-6.5×47.[citation needed]
See also[edit]
- 6.5×54mm Mannlicher–Schönauer - a cartridge that saw military service with the Greek Army from 1903-1949, which fires the same diameter and weight 9.0g bullet as the 6.5×47mm Lapua but achieves a lower muzzle velocity
Notes[edit]
- ^ abcdeC.I.P. TDCC datasheet 6,5 x 47 Lapua
- ^'October 2005 Blog'. 6mmbr.com.
- ^'New Products'. Vihtavuori.fi. Archived from the original on 7 March 2005. Retrieved 10 February 2007.
- ^ ab'Archived copy'. Archived from the original on 7 March 2016. Retrieved 6 March 2016.CS1 maint: archived copy as title (link)
- ^'6.5x47 Lapua Tactical Rifle Project'. demigodllc.com.
- ^'6mm PPC Cartridge Guide within AccurateShooter.com'. accurateshooter.com.
- ^'6.5×47 Lapua Cartridge Guide within AccurateShooter.com'. accurateshooter.com.
- ^Demigod short action 6.5mm comparison article
- ^Smith, Zak. '6.5mm Shootout: .260 Remington vs. 6.5x47 Lapua vs. 6.5 Creedmoor'.
- ^'Best Rifle Caliber - What The Pros Use - PrecisionRifleBlog.com'. precisionrifleblog.com.
- ^ abhttp://2poqx8tjzgi65olp24je4x4n.wpengine.netdna-cdn.com/wp-content/uploads/2017/02/Most-Popular-Long-Range-Rifle-Cartridge.png
- ^'Cortina Breaks 300-yard Club Record with 6.5×47mm Lapua (RL17) « Daily Bulletin'. bulletin.accurateshooter.com.
- ^'Amazing 2.856″ 10-Shot Group at 1000 Yards — Potential Record « Daily Bulletin'. bulletin.accurateshooter.com.
- ^'NRA 2014 National Championship Final Bulletin'(PDF). Archived from the original(PDF) on 10 October 2015. Retrieved 24 March 2017.
- ^'From the Bench – UKBRA 600 Yard Benchrest Shoot Diggle 15th October 2017'. targetshooter.co.uk.
- ^'6-6.5×47 « Search Results « Daily Bulletin'. bulletin.accurateshooter.com.
- ^'Mid-Sized Cartridge Comparison « Daily Bulletin'. bulletin.accurateshooter.com.
External links[edit]
Wikimedia Commons has media related to 6.5x47mm Lapua. |
- 6.5x47 Cartridge Guide, cartridge specs, load data, reloading tips, and more
- Zak Smith, 6.5mm Shootout: .260 Remington vs. 6.5x47 Lapua vs. 6.5 Creedmoor
- Zak Smith, 6.5x47 Lapua Tactical TackDriver (6mmBR.com Gun Of The Week)
- Nielson's 6.5×47 Nationals Winner, 6.5x47 Lapua Competition winner (Accurateshooter.com Gun of the Week)[permanent dead link]
- Beginski's new 6mm-6.5×47 Lapua, 6-6.5x47mm Lapua 3-Way Velocity Challenge: 6BR vs. 6BRX vs. 6-6.5x47 Lapua[permanent dead link]
- 7mm Wildcat based on 6.5×47 Lapua Case, 7mm version of the 6.5x47 Lapua[permanent dead link] (Accurateshooter.com Bulletin)
Retrieved from 'https://en.wikipedia.org/w/index.php?title=6.5×47mm_Lapua&oldid=970746082'
Author: Norman E. Johnson / Wolfe Publishing Co.
Date: Dec 15 2016
Date: Dec 15 2016
6x47 Lapua Brass
In 2006 Nammo Lapua presented the new 6.5x47 Lapua cartridge for long-range target shooting.
Origins of the 6.5 x47 lapua
It was developed in close cooperation with rifle manufacturers Swiss Grunig and Elmigar AG. The cartridge found its way into the hands of American shooters both as a target round and a fine medium big game cartridge. The 6.5x47 Lapua is a flat-shooting cartridge, for its size, and outperforms the .308 Winchester and many other target cartridges currently used in long range shooting. The selection of premium target and hunting bullets is good too.
![X47 X47](https://i2.wp.com/rifleshooter.com/wp-content/uploads/2014/11/photo-1-17.jpg?ssl=1)
Arguably, most any new cartridge in 6.5mm would have been welcomed by American shooters at the time; U.S. manufacturers had dragged their feet long enough. Nearly 60 years ago, Winchester surprised the shooting public with its introduction of the .264 Winchester Magnum. The potent cartridge would drive a 100-grain bullet 3,600 fps, or a 160-grain bullet over 2,900 fps. The cartridge was overshadowed, however by the introduction of the 7mm Remington Magnum in 1962. Still, shooters and handloaders longed for something better in the 6.5mm bore and a much needed selection of improved 6.5mm bullets. The fascination for higher velocity would be eclipsed by both accuracy and bullets with downrange superiority. It was apparent the 6.5mm bore could offer this; and barrel burning velocity obviously wasn’t the answer.
Gradually the door opened for a few, much better cartridge choices of both American and foreign manufacture in this long-awaited caliber. As more of these 6.5mm cartridges and bullets came on the scene, I worked with several of them. Among these cartridges were the 6.5-284 Norma, .260 Remington, 6.5x55 Swedish Mauser, 6.5mm-06, a new cartridge of my own creation named the 6.5x42 NEJ Super Grouper (born of the modified Winchester Super Short Magnum series) and more recently the 6.5x47 Lapua.
6.5x47 Lapua Brass Sale
As the 6.5x47 Lapua cartridge is a very well proportioned, medium-size case with a short powder column. The case has annealed necks and a very hard base construction that fits a standard .30-06 size bolt face. Though smaller in capacity than the .260 Remington and the 6.5x55 Swedish Mauser, the cartridge can be loaded to velocities that parallel these close counterparts. Small rifle primers are used in this case, either standard or magnum. A wide range of today’s medium burn rate powders are adaptable to the 6.5x47 Lapua, which is largely dependent on bullet weight and shape and bore dimensions. It’s not a fussy cartridge, and accuracy appears easy to come by.
There are currently precious few reloading manuals that cover the 6.5x47 Lapua. Berger Bullets 1st Edition Reloading Manual (2012), the Vihtavuori Reloading Guide for Centerfire Cartridges and Western Powders Reloading & Load Data Guide, are among the three I have. Perhaps Sierra, Hornady, Alliant, Barnes, Hodgdon, et al, will join in later. There is some Internet loading information that may also be helpful to some. I did, however, manage to compile sufficient load data largely from these three manuals, and 57 years of handloading experience came in quite handy too. Clipwrap for mac free download.
Testing The 6.5 x47 lapua
For testing the 6.5x47 Lapua, match-grade rifles were used, one a Model 70 Winchester and two others on Remington Model 40X actions. All three were equipped with match-grade triggers and target/varmint scopes with rigid, Picatinny mounting systems. I chose to go with barrels by Krieger, Criterion and E.R. Shaw. The 26-inch Krieger barrel is a four-groove with single point cut rifling. Bore diameter is .256 inch with a .264-inch groove diameter. The 27-inch Criterion barrel has six grooves with button rifling; bore diameter is .2555 inch with .2638-inch groove diameter. The 26-inch E.R. Shaw varmint weight barrel has button rifling with six lands and grooves. I didn’t get the specs on the bore and groove. Each barrel has a 1-8 rifling twist, which is required for use of longer, heavier 140-grain and higher BC bullets.
One of Dave Manson’s precision reamers was used to cut the chambers to within SAAMI specifications. This resulted in a .2915-inch chamber neck diameter and sufficient leade length to accommodate 142-grain, standard ogive bullets while not seating the base of the bullet too deeply into the case. A loaded bullet with a .0125-inch neck wall would result in a .289-inch case neck diameter. Though each rifle had 100 prepped cases, I made headspacing such that each chamber would handle fired cases from another rifle. All cases were trimmed to 1.840 inches and neck walls lathe-turned to .0125 inch within near zero runout. Cases would be closely monitored on repeated reloading to avoid neck wall thickening.
On hand were 32 different bullets ranging in weight from 95 to 142 grains. Bullets weighing from 120 to 130 grains are reported to provide optimal balance between velocity, accuracy and wind-deflection for long-range performance.
Redding handloading equipment was used in loading. A Redding in-line competition seating die was used to seat all bullets just short of land contact. [Norm has handloaded and chambered his own rifles for nearly 60 years and seats bullets to suit his experience. As such, there are no cartridge overall lengths supplied here, so handloaders should reduce powder charges accordingly and work up toward the charges listed while watching for pressure signs. – Ed.] As a quick, sure way of attaining desired seating depth, my short chamber seating checker serves a vital role. Here I used a short section of barrel that was reamed to the case datum line. This little gem was made from the 2-inch, cut-off muzzle section of barrel. I used the same reamers for this as used in chambering the barrel. Precise seating depth can be determined in a matter of seconds in this way. I have these for nearly all cartridges I load for, and it saves lots of time when changing bullets often.
![Brass Brass](https://www.snipershide.com/shooting/data/avatars/h/95/95782.jpg?1517966590)
Each thrown charge is weighed with a conventional powder scale, which takes only a few seconds per case. As a further control measure, I frequently examine loaded cartridges for coaxial run-out, having built a universal machine to precisely check three points of a loaded round for case head, neck and bullet eccentricity all at the same time. I have found that multiple inspections of any loaded cartridge for coincident axis can nip many problems in the bud.
Federal Gold Medal Small Rifle primers were used in all loads listed. The standard small rifle primers worked very well in tests down to near 0 degrees Fahrenheit. Velocities were taken at 10 feet from the muzzle using artificially lighted Oehler chronograph screens.
In arriving at a workable load for each bullet and barrel, I always stayed within the pressure parameters of the cartridge while in search of best accuracy. While I did conduct some proof load testing on the 6.5x47 Lapua cartridge, this was for my own information. I refrained from pushing the velocity envelope on the 6.5x47 Lapua cartridge. Many of these loads closely approximated 97 percentile of maximum listed loads found in the handloading manuals I had at hand. Your own formulated handloads must be perfected with caution. Be constantly mindful of high pressure signs in handloading any cartridge.
Incipient signs of case head expansion or separation must also be observed. Flashtool for xperia neo v mt11i unlock. I can offer this caveat for those courting high pressures with any case, including the 6.5x47 Lapua. While the Lapua case necks are annealed, the base and web area of the Lapua cases are very hard and durable and are likely to respond differently to case head or web expansion measurements. In general, it’s time for further investigation when any case head expansion reaches .0004 inch or, if belted cases reach .0002 inch. Any older, work-hardened cases can also pose a measurement problem, as does method or equipment used in taking these measurements.
In taking these critical measurements, I strongly recommend the use of a good micrometer over the commonly used Vernier caliper and to learn precisely how to interpret the outcome.
A review of the accompanying load data reveals impressive performance while staying within workable pressures. The outcome of testing three different barrels along with 32 different bullets and a number of different powders culminating in a 0.538-inch accuracy aggregate is outstanding performance by any standards.
Few cartridges that I have worked with have shown more promise or have been easier to load for. In one random series of tests, the Krieger barrel was pitted against the Criterion barrel with 140- and 142-grain bullets. Following 24, five-shot groups, averages were .338 and .333 MOA, respectively. There wasn’t a group as large as .5 inch among these. From 300 yards and beyond, accuracy and trajectory held up very well too. Bullets designed for this purpose easily remained in the .300- to .400-MOA range. Shooters will be very well pleased with a cartridge in 6.5mm that can deliver this level of accuracy and performance.