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Old 04-22-2009, 11:21 AM
sb_pete sb_pete is offline
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Quote:
Originally Posted by sonicbuff View Post
I found it. For the 7N6 in particular, following are the what needed for the calculator:

Ballistic Coefficient: 0.156 G7
Caliber: 5.450 mm
Bullet Weight: 52.47 gr
Muzzle Velocity: 900.0 m/sec
EEK, really? .156 BC? But they look so long and aerodynamic

For comparison purposes, a quick google search comes up with M193 being either .243 or .269, and M855 green tip at .304.

Looking at the Federal catalog:
- The 55gr FMJBT is .269,
- The 62gr FMJBT is .307,
- The 69gr SMK BTHP is .301,
- The 77gr SMK BTHP is .372

I had no idea the 5.45 projectiles were so inefficient. This brings up a different question.

- Is anyone making quality match grade ammo in 5.45x39mm?
- Or for that matter is anyone making quality brass? BTHP bullets in 5.45mm?
- Is there any reason this round couldn't achieve .223 accuracy?

-Pete
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