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6.5×47mm Lapua

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6.5×47mm Lapua
TypeRifle
Place of origin Finland
  Switzerland
Production history
DesignerNammo Lapua Oy
ManufacturerNammo Lapua Oy
Produced2005–present
Variants6-6.5x47 Lapua and Long Dasher
Specifications
Bullet diameter6.71 mm (0.264 in)
Neck diameter7.41 mm (0.292 in)
Shoulder diameter11.53 mm (0.454 in)
Base diameter11.95 mm (0.470 in)
Rim diameter12.01 mm (0.473 in)
Rim thickness1.37 mm (0.054 in)
Case length47 mm (1.9 in)
Overall length69.5 mm (2.74 in)
Primer typeLarge rifle for Prototypes, small rifle since start of production
Maximum pressure (C.I.P.)435 MPa (63,100 psi)
Ballistic performance
Bullet mass/type Velocity Energy
6.7 g (103 gr) Scenar 939 m/s (3,080 ft/s) 3,087 J (2,277 ft⋅lbf)
8.0 g (123 gr) Scenar 880 m/s (2,900 ft/s) 3,098 J (2,285 ft⋅lbf)
9.0 g (139 gr) Scenar 820 m/s (2,700 ft/s) 3,028 J (2,233 ft⋅lbf)
Test barrel length: 27.5
Source(s): Lapua

6.5×47mm Lapua (or 6.5×47mm) is a rifle cartridge that was developed specifically for 300–1000 meter competition by ammunition maker Nammo Lapua and the Swiss rifle manufacturer Grünig & Elmiger AG in 2005.[1]

Features

The cartridge has many special features, including:[2]

  • The cartridge chamber dimensions are optimized for target bullets.[3]
  • High pressure level (435 MPa / 63,091 psi) and optimized[peacock prose] powder capacity enables high velocity and flat trajectory.
  • Reduced barrel wear[4] compared to 6mm Norma BR
  • The 6.5×47mm Lapua has a base diameter and overall length similar to the 7.62×51mm, allowing it to accept the same bolt heads and fit into similar short actions and magazines.
Thanks to the short length of the 6.5x47, it can be loaded with very long target bullets without placing the base of the bullet below the neck. This eliminates the dreaded donut problem seen by many cases that get loaded over 20 times, and with this cartridges ability to handle 30+ reloads, avoiding the donut is a must. Left to right: Lapua FMJ 144gr, Hornady 123gr loaded to a COAL of 2.71in, And a Hornady 123gr A-Max.

History

The 6.5x47mm Lapua has no direct parent case. This is obvious in that there are no similar cartridges of this size or dimension with a small rifle primer. It was designed by Lapua with a great deal of help from Swiss rifle manufacturer, Grünig & Elmiger.[5] The case also borrows from many characteristics of the 6mm PPC[6] and thus has been proving itself to be inherently accurate.[7]

Performance

The 6.5×47mm was designed from the beginning by Lapua to optimize accuracy, barrel life, and case capacity in a 6.5mm cartridge for target and tactical shooting. The 6.5×47mm travels at slightly lower speeds than 6.5mm/.260 cartridges such as the .260 Remington, because of its smaller case volume.[8] 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 fps faster than the 6.5x47mm. Although the 6.5x47mm is said to have superior brass quality compared to the 6.5 Creedmoor.[9] The 6.5x47mm was the most popular cartridge during the PRS competition in 2015 beating out competing cartridges by more than two thirds. [10]

It has a chamber pressure of 63100 PSI,[11][12] which is slightly higher than the .260 Remington's maximum rated pressure.

Competitions

Competitively the 6.5x47 has been winning many records, most of them at 600yards. Erik Cortina broke a 300-yard club record with 6.5×47 Lapua (RL17).[13] 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 beating out the record previously held by the 6mm Dasher.[14] American Kevin Nevius set a new NRA national record for high power rifle with a perfect score of 200 with 20 xs at 600 yards – 20 shots (Prone-Any Sight). Nevius was using 6.5 x 47 Lapua, 136 gr. Scenar-L OTM bullets, and VV N150 powder. The 6.5x47 was also the dominant caliber in PRS this year, beating out all competing cartridges in the top ten tear, and dominated the other categories by more than two thirds. [15]

The 6.5x47 has become very popular with metallic silhouette shooters. The 2014 high NRA Nation Championship equipment survey lists the 6.5x47 as second most popular caliber for both the high power rifle and high power hunter rifle competition. [16]

Variants

Soon after the introduction of the 6.5x47, shooters were using the case as the basis for a new wildcat, by necking it down to 6mm. This wildcat cartridge is often called a 6-6.5x47[17] to avoid confusing it with a 6x47 Swiss Match.[18] A similar case but with a large rifle primer. Another version that has been popular is a necked down version with a 40d shoulder. PTG sells reamers for this and it has demonstrated a gain of about 100fps over the standard 6-6.5x47.[citation needed]

See also

Notes

  1. ^ 6mmbr.com October 2005 News, Features, and Products
  2. ^ "New Products". Vihtavuori.fi. Archived from the original on 2005-03-07. Retrieved 10 February 2007. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  3. ^ http://www.lapua.com/en/sport-shooting/centerfire-rifle/6-5x47-lapua-cartridge.html
  4. ^ http://demigodllc.com/articles/6.5x47-lapua-tactical-rifle/
  5. ^ http://www.lapua.com/en/sport-shooting/centerfire-rifle/6-5x47-lapua-cartridge.html
  6. ^ http://www.accurateshooter.com/cartridge-guides/6mmppc/
  7. ^ http://www.accurateshooter.com/cartridge-guides/65x47/
  8. ^ Smith, Zak. "6.5mm Shootout: .260 Remington vs. 6.5x47 Lapua vs. 6.5 Creedmoor".
  9. ^ http://precisionrifleblog.com/2015/10/12/best-rifle-caliber/
  10. ^ http://2poqx8tjzgi65olp24je4x4n.wpengine.netdna-cdn.com/wp-content/uploads/2017/02/Most-Popular-Long-Range-Rifle-Cartridge.png
  11. ^ Lawrence, Steve; Mobley, Ed. "6.5×47 Lapua Cartridge Guide". AccurateShooter.com. Retrieved 24 January 2016.
  12. ^ "6,5 x 47 Lapua" (PDF) (20 May 2014 ed.). Commission internationale permanente pour l'épreuve des armes à feu portatives. 16 May 2006. Retrieved 24 January 2016.
  13. ^ http://bulletin.accurateshooter.com/2010/04/erik-cortina-breaks-300-yard-f-class-record-with-6-5x47-lapua/
  14. ^ http://bulletin.accurateshooter.com/2016/08/amazing-2-856-10-shot-group-at-1000-yards/
  15. ^ http://2poqx8tjzgi65olp24je4x4n.wpengine.netdna-cdn.com/wp-content/uploads/2017/02/Most-Popular-Long-Range-Rifle-Cartridge.png
  16. ^ "NRA 2014 National Championship Final Bulletin" (PDF). Retrieved 24 March 2017.
  17. ^ http://bulletin.accurateshooter.com/?s=6-6.5x47&submit=Search
  18. ^ http://bulletin.accurateshooter.com/2014/09/mid-sized-cartridge-comparison/
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