6 Casing Specs

6.5-284 Norma
.308 Winchester on the left, 6.5-284 Norma on the right
Place of originSweden
Production history
Parent case.284 Winchester
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 cm3)
Ballistic performance
Bullet mass/typeVelocityEnergy
125 gr (8 g) Partition3,000 ft/s (910 m/s)2,497 ft⋅lbf (3,385 J)
142 gr (9 g) Hodgdon2,850 ft/s (870 m/s)2,557 ft⋅lbf (3,467 J)
Test barrel length: 24
Source(s): ,[1][2][3]

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

Casing is the major structural component of a well. It is a tubular steel product used to line the wellbore (maintain borehole stability), prevent contamination of water sands, isolate water from producing formations, and control well pressures during drilling, production, and workover operations. But when you're done reading it, click the close button in the corner to dismiss this alert. Torque is the amount of rotational energy imparted on a tubular connection when two joints are screwed together. The recommended torque for any particular tubular is based on the connection type.


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.


6 Casing Specs

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.[4] 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.[5] In contrast, most hunting rifles show similar accuracy at 100 yards (91.4 m) to 200 yards (182.9 m). 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).[6]

See also[edit]

13 3 8 Casing Specs


  1. ^https://fusiontables.googleusercontent.com/fusiontables/embedviz?viz=CARD&q=select+*+from+1C5o2xk_hWmBsTsTUWwoZ262XZOtOsNloF2QDW28+where+col4+%3D+14605+order+by+col0+asc&tmplt=1&cpr=1
  2. ^http://www.hodgdonreloading.com/data/rifle
  3. ^https://fusiontables.googleusercontent.com/fusiontables/embedviz?viz=CARD&q=select+*+from+1C5o2xk_hWmBsTsTUWwoZ262XZOtOsNloF2QDW28+where+col4+%3D+14615+order+by+col0+asc&tmplt=1&cpr=1
  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. ^http://www.eabco.com/6.5_mm_cartridges.html

External links[edit]

  • Wildcatting the .284 Winchester Long-range shooters and wildcatters have kept the .284 alive. By M.L. McPherson
  • Why the 6.5x284 for Long Range Shooting? by Robert Whitley, Precision Shooting Magazine, April 2007, Vol 54
  • The 6.5mm-284 Norma and 6.5mm Remington Magnum by Chuck Hawks

6 Casing Specs Meaning

6 Casing Specs6 Casing SpecsSpecs
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