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6.5-284 Norma

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Swedish rifle cartridge
6.5-284 Norma
.308 Winchester on the left, 6.5-284 Norma on the right
TypeRifle
Place of originSweden
Production history
DesignerNorma
Designed1999
Specifications
Parent case.284 Winchester
Case typerebated rim, straight walled bottleneck
Bullet diameter.264 in (6.7 mm)
Neck diameter.297 in (7.5 mm)
Shoulder diameter.475 in (12.1 mm)
Base diameter.501 in (12.7 mm)
Rim diameter.473 in (12.0 mm)
Rim thickness.054 in (1.4 mm)
Case length2.170 in (55.1 mm)
Overall length3.228 in (82.0 mm)
Case capacity68.33 gr H2O (4.428 cm)
Ballistic performance
Bullet mass/type Velocity Energy
125 gr (8 g) Partition 3,000 ft/s (910 m/s) 2,497 ft⋅lbf (3,385 J)
142 gr (9 g) Hodgdon 2,850 ft/s (870 m/s) 2,557 ft⋅lbf (3,467 J)
Test barrel length: 24
Source(s): ,

The 6.5-284 Norma (6.5x55mmRB Norma) originated as a wildcat cartridge based on the .284 Winchester cartridge necked down to 6.5 mm.

History

The parent case .284 Winchester was created around 1963, but did not see extensive commercial use. The 6.5 caliber allowed for the use of long, aerodynamic bullets. In 1999, Norma submitted it to CIP. It has since been standardized as the 6.5mm-284 Norma.

Use

The 6.5-284 has been used extensively in benchrest competitions and is known as an extremely accurate long range round. Using an improved version of the 6.5-284, Rich DeSimone set a 1,000-yard (914.4 m) world record with a 1.564-inch (39.73 mm) group. Rich DeSimone's 1,000-yard (914.4 m) record has been broken by Tom Sarver, who shot a 1.403-inch (35.64 mm) group in 2007 using a .300 Hulk wildcat cartridge that is based on the .338 Lapua Magnum cartridge. A 140 gr (9.1 g) bullet in this caliber is typically fired at 3,000 ft/s (914 m/s) to 3,100 ft/s (945 m/s).

See also

References

  1. "FAQ: Google Fusion Tables - Fusion Tables Help".
  2. "Take Aim at Rifle Reloading Data | Hodgdon Reloading". Archived from the original on 2014-03-01. Retrieved 2017-03-31.
  3. "FAQ: Google Fusion Tables - Fusion Tables Help".
  4. DeSimone's Dynamic Duo - 1000-Yard Record Rig (Reborn) and Classy New Curly Ash 6.5 Super
  5. Sarver Shoots 1.403″ Group at 1000 Yards
  6. "Comparison of 6.5mm Cartridges | 6.5 Grendel | 6.5 BRM | 6.5 X 47 Lapua | 6.5 Creedmoor | 260 Rem | 6.5 X 55 Swedish | 6.5-06 | 6.5 - 284 | 264 Win Mag | 26 Nosler".

External links

Rebated rim (RB) cartridges
Pistol / carbine / PDW.41 AE • .429 DE • .440 Cor-Bon • .475 Wildey Magnum • .50 AE • .50 GI • FN 5.7×28mm • HK 4.6×30mm
Rifle (intermediate & fully powered).276 Enfield • .284 Winchester • .30 Remington AR • .350 Legend • .375 SOCOM • .375 Swiss P • .400 Legend • .416 Hushpuppy • .425 Westley Richards • .45 Raptor • .450 Bushmaster • .458 HAM'R • .458 SOCOM • .45-70 Auto • .499 Leitner-Wise • .50 Beowulf • .50 Krater • .500 Jeffery • .502 Thunder Sabre • .505/.404 Stewart • .510 Beck • .585 Nyati • .600 Overkill • 6.5-284 Norma • 6.8 Western • 8×63mm patron m/32 • 8×68mm S • Nosler cartridges (22 • 26 • 27 • 28 • 30 • 33) • Remington Short Action Ultra Magnum (7mm • .300) • Remington Ultra Magnum (7mm • .300 • .338 • .375) • Winchester Short Magnum (.270 • 7mm • .300 • .325) • Winchester Super Short Magnum (.223 • .243 • .25)
Autocannon (20mm+)20×70mmRB • 20×72mmRB • 20×80mmRB • 20×101mmRB • 20×110mmRB • 20×128mmRB • 30×90mmRB • 30×92mmRB • 55×175mmRB
Cartridges derived from the .284 Winchester or its derivatives (including wildcats)
First generation
Second generation
Based on .450 Bushmaster
Based on .475 Wildey Magnum
  • .357 Wildey Magnum/.357 Peterbuilt
  • .41 Wildey Magnum
  • .44 Wildey Magnum
  • .45 Wildey Magnum
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