The Firing Line Forums - View Single Post - Whose bushing dies- any differences?

Bart B. · April 15, 2015, 10:53 AM

Again, Guffey, you've misquoted me. I never said that. Sierra's tech made a similar one, but not what you said.

I think you've got the wherewithal to measure cases, rifle parts and chambers to learn that partial full length sizing of bottleneck cases is not as good as it gets. If it was, it would be popular amongst those getting best accuracy. It's not popular at all as been proved for decades. More often than not, it ends up making case headspace a thousandth or more longer than chamber headspace; the bolt binds when closing on the chambered round. A well-known cause of reduced accuracy.

And everyone except you knows a case cannot outrun a firing pin. Where do think the motive force is that could possibly make a chambered round move forward in the chamber by itself?

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243winxb, have you measured your .243's chamber neck diameter and compared that to what a case neck diameter is? Or are you just assuming the case neck's the same diameter as the chamber neck?

April 15, 2015, 10:53 AM	#6
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Again, Guffey, you've misquoted me. I never said that. Sierra's tech made a similar one, but not what you said. I think you've got the wherewithal to measure cases, rifle parts and chambers to learn that partial full length sizing of bottleneck cases is not as good as it gets. If it was, it would be popular amongst those getting best accuracy. It's not popular at all as been proved for decades. More often than not, it ends up making case headspace a thousandth or more longer than chamber headspace; the bolt binds when closing on the chambered round. A well-known cause of reduced accuracy. And everyone except you knows a case cannot outrun a firing pin. Where do think the motive force is that could possibly make a chambered round move forward in the chamber by itself? --------------------- 243winxb, have you measured your .243's chamber neck diameter and compared that to what a case neck diameter is? Or are you just assuming the case neck's the same diameter as the chamber neck? Last edited by Bart B.; April 15, 2015 at 01:18 PM.