The Firing Line Forums - View Single Post - Is it possible to meet the legal energy demands?

Jim Watson · September 2, 2010, 10:49 AM

A .45 - 2 7/8" (.45-110) should be able to drive a 520 gr bullet at 1350 fps for 2320 J at 100 yards. Assuming a ballistic coefficient of .36 which is conservative for those heavy Creedmoor bullets.

Mike Venturino's book 'Shooting the Buffalo Rifles' gives bullet weight and velocity for many BP calibres which can be entered into the program at:
http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
to estimate energy.

September 2, 2010, 10:49 AM	#11
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,542	A .45 - 2 7/8" (.45-110) should be able to drive a 520 gr bullet at 1350 fps for 2320 J at 100 yards. Assuming a ballistic coefficient of .36 which is conservative for those heavy Creedmoor bullets. Mike Venturino's book 'Shooting the Buffalo Rifles' gives bullet weight and velocity for many BP calibres which can be entered into the program at: http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi to estimate energy.