ontarget
Member
To continue the thought of my last question, how would a .45 Kentucky rifle loaded with GOEX 3F and PRB compare to a 45-70 with similar weight bullet and BP load? I'm looking at range and trajectory, etc.
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Roundball/Maxiball Ballistics
Below are Thompson/Center Arms' suggested loads from a paper publication of theirs, printed in October of 1980. All of these loads specify no. 11 caps or T/C flints. Round ball loads specify T/C patch material lubricated with T/C no. 13. Maxi-ball loads specify the use of Maxi-Lub as a lubricant. FPS = feet per second at muzzle. Ft-lbs = foot-pounds of energy at muzzle. Grains listed after projectile type represent bullet weight.
Hawken, 45 caliber
Powder Round ball loads (.440", 127 grains): Maxi-Ball loads (240 grains):
50 FFg 1605 FPS - 732 ft/lbs
60 FFg 1720 FPS - 841 ft/lbs
70 FFg 1825 FPS - 947 ft/lbs
80 FFg 1929 FPS - 1054 ft/lbs 1564 FPS - 1195 ft/lbs
90 FFg 2003 FPS - 1140 ft/lbs 1659 FPS - 1345 ft/lbs
100 FFg 2081 FPS - 1231 ft/lbs 1743 FPS - 1485 ft/lbs
110 FFg 2158 FPS - 1324 ft/lbs
http://www.epmuzzleloaders.com/ballistics.html