58 Caliber Round Ball Velocity

[Semisane]

Has anyone out there got muzzle velocity figures for a .58 PRB with various powder charges? Barrel length and twist are not real important - I'm just looking for some "ball park" figures that someone gets for anything from 70 to 120 grains of Pyrodex or JSG.

 

[gmww]

Lyman Black Powder Handbook & Loading Manual page 270 for .58 cal. RB, from a 32" barrel, 1:48" twist.

Pyrodex RS

70 grns=1231 fps
80 grns=1317 fps
90 grns=1378 fps
100grns=1439 fps
110grns=1538 fps
120grns=1638 fps

 

[Semisane]

Thanks much gmww. That's just what I was looking for. :thumbsup:

 

[doulos]

Actually I saw apost by Idaho PRB that he chronographed his.58 Green Mountain 32 inch barrel. He used KIK 2f black and his velocities were 1530 for 100 grains and 1600 for 110grains.

 

[brubincam]

if he would of used elephant it would of been clos er to 500--

 

[roundball]

if he would of used elephant it would of been clos er to 500--

:rotf:
If it ignited at all...
:thumbsup: