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jal5 · September 30, 2009, 07:13 AM

I have read a lot about COL and understand the relationship to pressure, and ability to cycle the rounds, etc. However in loading 357 mag for revolver, how does consistency of COL in a batch of finished rounds affect accuracy?

IIRC the manual shows max. COL as 1.590 for the bullets I was loading and 1.570 in the example gun. I was getting 1.587-1.590 in that batch. Does that .003 make any real difference? I can never get them exactly consistent either, but I don't resize pistol cases. How important is this for overall accuracy? My usual reloads are within .003-.006 range in COL.

So how picky do I need to be about COL in developing a load and in my general reloading procedures for pistol ammo used for target or hunting?

thanks,
Joe

September 30, 2009, 07:13 AM	#1
jal5 Senior Member Join Date: January 13, 2009 Location: NE Ohio Posts: 419	Consistency of COL and 357 mag cases I have read a lot about COL and understand the relationship to pressure, and ability to cycle the rounds, etc. However in loading 357 mag for revolver, how does consistency of COL in a batch of finished rounds affect accuracy? IIRC the manual shows max. COL as 1.590 for the bullets I was loading and 1.570 in the example gun. I was getting 1.587-1.590 in that batch. Does that .003 make any real difference? I can never get them exactly consistent either, but I don't resize pistol cases. How important is this for overall accuracy? My usual reloads are within .003-.006 range in COL. So how picky do I need to be about COL in developing a load and in my general reloading procedures for pistol ammo used for target or hunting? thanks, Joe __________________ We live in the greatest country on Earth- always be thankful!