Has anyone chronographed MV for 54 cal PRB using 80 gr Pyrodex? Or 50 cal 275 gr Maxihunters with 80 gr Pyrodex?
If you did, can you please tell me what the fps is?
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I'm not as good as I'm gonna get - but I'm better than I used to be. "Life without God is like an unsharpened pencil - it has no point."
50 caliber 275 gr maxi hunter 80 grains- 1494 velocity 1586 energy
54 caliber PRB 80 grains - velocity 1654 muzzle energy 1397
information taken from the T/C manual
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"Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, a total wreck, screaming Yahoo, with a big smile on your face."
Dave - your the man! I figured you would be the one to come through. Just one thing though, I think you calculation for the 50 cal 275 gr Maxi is a bit off for the ME. I calculated it out to be 1363 FtLbs. Your figures for the 54 cal PRB are right on the money.
((1494*1494)275)/450000= 1364
PS: thanks - you saved me from buying a chrony. At least for now.
__________________ PLEASE NOTE THAT DUE TO THE RISING COST IN AMMO PRICES I WILL NO LONGER BE FIRING A WARNING SHOT.
A government big enough to give you everything you want is big enough to take away everything you have.
I'm not as good as I'm gonna get - but I'm better than I used to be. "Life without God is like an unsharpened pencil - it has no point."
my numbers are not chronographed.. like I said, they came out of T/C manual from a very old Renegade Rifle...
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"Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, a total wreck, screaming Yahoo, with a big smile on your face."
OK - I see where they came up with the 1586 ME. They used the 320 gr bullet. Surprisingly that 45 extra grains of bullet at the same velocity can account for a tad over 120 FtLbs of energy.
I know the formula for computing energy from my archery days. I just didn't know the velocity.
FYI and anyone else following this th formula for computing ME is Einstein's formula E=M(C*C)/450,000 where M=bullet wt in gr. and C=velocity. The 450,000 is a constant.
__________________ PLEASE NOTE THAT DUE TO THE RISING COST IN AMMO PRICES I WILL NO LONGER BE FIRING A WARNING SHOT.
A government big enough to give you everything you want is big enough to take away everything you have.
I'm not as good as I'm gonna get - but I'm better than I used to be. "Life without God is like an unsharpened pencil - it has no point."
Chronographed velocities.
