View Full Version : need boolit length info for 50
nekshot
06-09-2017, 12:54 PM
does any one have the calculator for length of slug? I have a 50 cal muzzle loader rifling barrel with 1 in 48 twist in a 50-90 cartridge and would like to know the optimum slug length.
thanks for info
nekshot
06-10-2017, 07:23 AM
I found a old thread that says 7/8 inch is good start so I will keep lengthening this 320 Lee real boolit mold.
This guy has a couple of calculators that you can back into the length with.
http://www.geoffrey-kolbe.com/barrel_twist.htm
http://www.geoffrey-kolbe.com/drag.htm
Berger uses the same calculators but they look a little different
http://www.bergerbullets.com/twist-rate-calculator/
And advanced calculator at JBM ballistics
http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi
nekshot
06-16-2017, 07:22 AM
good, now I need to learn the language for these programs! Always learning, helps the grey cells stay strong.
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