The Firing Line Forums - View Single Post - Actual distance to rifling

zplinker · October 2, 2013, 11:47 AM

How about a slightly different approach to setting your sizing die to correctly size your brass to your rifle: back the full length die off the shell holder a couple turns (often referred to as partial sizing). Size and load a couple rounds, fire them, and repeat. About the 3rd time, the partially sized brass won't chamber. Now, turn that full length die down in small amounts until you can just close on that case, and you have it. Obviously your brass will have to be the same brand, similar number of loadings, or annealed, etc. At that point you can measure with your head and shoulders gauge, record that number, and have a useful number to shoot for next time.

October 2, 2013, 11:47 AM	#12
zplinker Senior Member Join Date: February 21, 2011 Location: way out here Posts: 262	How about a slightly different approach to setting your sizing die to correctly size your brass to your rifle: back the full length die off the shell holder a couple turns (often referred to as partial sizing). Size and load a couple rounds, fire them, and repeat. About the 3rd time, the partially sized brass won't chamber. Now, turn that full length die down in small amounts until you can just close on that case, and you have it. Obviously your brass will have to be the same brand, similar number of loadings, or annealed, etc. At that point you can measure with your head and shoulders gauge, record that number, and have a useful number to shoot for next time.