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Ron Smith · 04-12-2011, 07:58 PM

Jerry,

If a primer backs out part way,it's a case of poor head space. If a primer flattens, blows out, or craters flowing into the firing pin hole, thats excessive pressure.

After firing a cartridge, slide your finger over the primer. If it's not still flush with the head of the casing, or is protruding (backed part way out), then it's a head space problem.

One of the primary causes of case separation is bad head space exceding .005". Extreme (overload) pressure is the other more common cause running neck and neck with brittle, over used (stretched), or weaked brass.

Granted, there are other extreme, uncommon and or rare causes for case separations, but these are by far the most common and the first to check for, 99% of the time.

Ron

04-12-2011, 07:58 PM	#10
Ron Smith User Join Date: Feb 2004 Location: Orygun Posts: 4,243 Thanks: 118 Thanked 245 Times in 150 Posts	Jerry, If a primer backs out part way,it's a case of poor head space. If a primer flattens, blows out, or craters flowing into the firing pin hole, thats excessive pressure. After firing a cartridge, slide your finger over the primer. If it's not still flush with the head of the casing, or is protruding (backed part way out), then it's a head space problem. One of the primary causes of case separation is bad head space exceding .005". Extreme (overload) pressure is the other more common cause running neck and neck with brittle, over used (stretched), or weaked brass. Granted, there are other extreme, uncommon and or rare causes for case separations, but these are by far the most common and the first to check for, 99% of the time. Ron __________________ I Still Need DWM side plate #49... if anyone runs across a nice one. What ~Rudyard Kipling~ said...