The Firing Line Forums - View Single Post - Does a primer make that much difference??

warnerwh · July 19, 2012, 11:37 PM

I've noticed that in using Unique and loading medium loads in .357 and .44 magnum that magnum primers open up the groups at 25 yards about 3/4 to 1". I consider 1.5" good enough but 2.5 is much too large. This is the same even changing the amount of powder and bullet.

In no way have I done a thorough test but have tried both magnum but don't bother trying the magnum primers. 98% of my shooting is with medium loads that is the only certainty I have experienced.

July 19, 2012, 11:37 PM	#28
warnerwh Senior Member Join Date: February 12, 2009 Posts: 278	I've noticed that in using Unique and loading medium loads in .357 and .44 magnum that magnum primers open up the groups at 25 yards about 3/4 to 1". I consider 1.5" good enough but 2.5 is much too large. This is the same even changing the amount of powder and bullet. In no way have I done a thorough test but have tried both magnum but don't bother trying the magnum primers. 98% of my shooting is with medium loads that is the only certainty I have experienced. __________________ Portland, Or