I today E-mailed the following Message to Steyr Arms, Inc. C.E.O., Scott O'Brien:
"Mr. O'Brien,
Thank you for your encouraging response to my March 20, 2013 suggestion for a much-needed "heart transplant" for the 20th Century AUG: a multi-purpose 6.5mm Grendel-chambered Steyr AUG. To that end, I now submit for your consideration a suggestion for taking the new, large-diameter Barrel design (breech end) of the improved Thales F90, to its logical conclusion: increase the diameter of the Bolt head-Barrel Extension, while retaining the present diameter of the Bolt shank, to allow safe operation of higher chamber pressures for the Grendel --- operating pressures which have proven safe in 6.5mm Grendel Bolt-action rifles, with increased performance a result.
Remington Arms has used this technique in their 22-inch-barrelled .30 Remington AR-chambered R-15, to good effect: a rebated cartridge with a .308 Winchester rim diameter, in an AR-15-length action. Per Remington's ballistics chart for their best .30 RAR loading: 125-grain AccuTip BT bullet (BC=0.335) Velocity/Energy values of 2800 fps/2176 ft-lb, at the muzzle, and 1610 fps/719 ft-lb, at 500 yards.
Compare to 6.5mm Grendel +P load, in a 22-inch Bolt-action rifle: 139-grain Lapua Scenar BT (BC=0.615) Velocity/Energy values of 2700 fps/2250 ft-lb, at the muzzle, and 2020 fps/1259 ft-lb, at 500 yards. And, even from a compact 16-inch-barrelled 6.5mm Grendel +P-improved Steyr AUG, the 139-grain Lapua Scenar BT projectile leaves the muzzle at approx. 2550 fps/2007 ft-lb (surpasses the .30 RAR's 22-inch barrel slight ME advantage, by 100 yards), and retains 1895 fps/1108 ft-lb, at 500 yards.
I think it's fair to state that a 6.5mm Grendel +P Steyr AUG would be well-received.
Thank you for your consideration.
Sincerely,"
"Mr. O'Brien,
Thank you for your encouraging response to my March 20, 2013 suggestion for a much-needed "heart transplant" for the 20th Century AUG: a multi-purpose 6.5mm Grendel-chambered Steyr AUG. To that end, I now submit for your consideration a suggestion for taking the new, large-diameter Barrel design (breech end) of the improved Thales F90, to its logical conclusion: increase the diameter of the Bolt head-Barrel Extension, while retaining the present diameter of the Bolt shank, to allow safe operation of higher chamber pressures for the Grendel --- operating pressures which have proven safe in 6.5mm Grendel Bolt-action rifles, with increased performance a result.
Remington Arms has used this technique in their 22-inch-barrelled .30 Remington AR-chambered R-15, to good effect: a rebated cartridge with a .308 Winchester rim diameter, in an AR-15-length action. Per Remington's ballistics chart for their best .30 RAR loading: 125-grain AccuTip BT bullet (BC=0.335) Velocity/Energy values of 2800 fps/2176 ft-lb, at the muzzle, and 1610 fps/719 ft-lb, at 500 yards.
Compare to 6.5mm Grendel +P load, in a 22-inch Bolt-action rifle: 139-grain Lapua Scenar BT (BC=0.615) Velocity/Energy values of 2700 fps/2250 ft-lb, at the muzzle, and 2020 fps/1259 ft-lb, at 500 yards. And, even from a compact 16-inch-barrelled 6.5mm Grendel +P-improved Steyr AUG, the 139-grain Lapua Scenar BT projectile leaves the muzzle at approx. 2550 fps/2007 ft-lb (surpasses the .30 RAR's 22-inch barrel slight ME advantage, by 100 yards), and retains 1895 fps/1108 ft-lb, at 500 yards.
I think it's fair to state that a 6.5mm Grendel +P Steyr AUG would be well-received.
Thank you for your consideration.
Sincerely,"
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