PDA

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.

EDG
06-16-2017, 12:04 AM
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.