Nolo
Member
Especially GunTech:
I'd appreciate it if someone would draw a few of these 7mm carts for me, I'm trying to compare what kind of pressures I have to deal with for each one:
.276 Firebrand Heavy Mk. I (.276 Pedersen Improved)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 51.4mm
Over All Length - 72.5mm
Base Diameter - 11.4mm
Over Shoulder Length - 45.9mm
Under Shoulder Length - 41.6mm
Shoulder Diameter - 9.8mm
.276 Firebrand Heavy Mk. II (6.5 FA Scaled)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 52.0mm
Over All Length - 73.6mm
Base Diameter - 11.3mm
Over Shoulder Length - 46.9mm
Under Shoulder Length - 44.7mm
Shoulder Diameter - 8.6mm
.276 Firebrand Heavy Mk. III (7.7 Arisaka Necked)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 57.2mm
Over All Length - 75.5mm
Base Diameter - 11.9mm
Over Shoulder Length - 50.0mm
Under Shoulder Length - 47.5mm
Shoulder Diameter - 10.9mm
The first two will need QuickDraw, unless you already have the .276 Pedersen cartridge in there (for the first one, anyway, the second is a completely new cartridge). The first one is a .276 Pedersen with a heavier bullet and loaded significantly hotter. The second is a completely new cartridge that is essentially a scaled-up 6.5x48mm Firebrand (GunTech knows what that is). The last is a 7.7mm Arisaka necked-down to 7mm.
I know that these cartridges will generate horrendous pressures, but I want to see what I'm dealing with and go from there. All of the designs were created especially for bolt-action rifles.
Thanks a million in advance.
I'd appreciate it if someone would draw a few of these 7mm carts for me, I'm trying to compare what kind of pressures I have to deal with for each one:
.276 Firebrand Heavy Mk. I (.276 Pedersen Improved)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 51.4mm
Over All Length - 72.5mm
Base Diameter - 11.4mm
Over Shoulder Length - 45.9mm
Under Shoulder Length - 41.6mm
Shoulder Diameter - 9.8mm
.276 Firebrand Heavy Mk. II (6.5 FA Scaled)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 52.0mm
Over All Length - 73.6mm
Base Diameter - 11.3mm
Over Shoulder Length - 46.9mm
Under Shoulder Length - 44.7mm
Shoulder Diameter - 8.6mm
.276 Firebrand Heavy Mk. III (7.7 Arisaka Necked)
Velocity Goal: 2800-2900 f/s
Bullet Weight: 180 Grains
Energy Goal: 3100-3200 ft-lbs
Bullet Diameter - 7.2mm
Case Length - 57.2mm
Over All Length - 75.5mm
Base Diameter - 11.9mm
Over Shoulder Length - 50.0mm
Under Shoulder Length - 47.5mm
Shoulder Diameter - 10.9mm
The first two will need QuickDraw, unless you already have the .276 Pedersen cartridge in there (for the first one, anyway, the second is a completely new cartridge). The first one is a .276 Pedersen with a heavier bullet and loaded significantly hotter. The second is a completely new cartridge that is essentially a scaled-up 6.5x48mm Firebrand (GunTech knows what that is). The last is a 7.7mm Arisaka necked-down to 7mm.
I know that these cartridges will generate horrendous pressures, but I want to see what I'm dealing with and go from there. All of the designs were created especially for bolt-action rifles.
Thanks a million in advance.
