discrepancies center axes chamber

jeff-portnoy · Oct 25, 2012

Hi.
I watch minor center axes discrepancies between mouth chamber and barrel in my 9x19.
What is maximum center axes discrepancies for cartrige chamber and barrel ?
What consequences?

Jim K · Oct 25, 2012

Again, a language problem. If you mean that the front of the chamber is larger in diameter than the barrel ahead of it, that is normal. The slight shoulder is what stops the cartridge case and supports it during firing. Another way to put it is that the 9x19 cartridge "headspaces" on the case mouth.

Jim

25cschaefer · Oct 25, 2012

What are you talking about? You want to know how big of a logging implement you can shoot out of your 9mm?

rcmodel · Oct 25, 2012

The front of the 9mm chamber, or headspace step, is approx .380" of an inch.

The rear of the rifled bore is somewhere around .355" - .356".

So you got somewhere around a .025" differance you can see when you look in the chamber.

Like others already said, it's supposed to be that way.

rc

jeff-portnoy · Oct 25, 2012

Jim K said:
Again, a language problem. If you mean that the front of the chamber is larger in diameter than the barrel ahead of it, that is normal. The slight shoulder is what stops the cartridge case and supports it during firing. Another way to put it is that the 9x19 cartridge "headspaces" on the case mouth.

Jim

different thickness the circumference shoulder

BBBBill · Oct 25, 2012

Guys, it seems to me that he's talking about an apparent discrepency between the bore centerline and the chamber centerline. Could be real if the reamer was cocked during chambering and shows up as an uneven throat/leade.

Jim K · Oct 25, 2012

I don't mean to disparage anyone, especially someone who seems to have problems with the language, but what jeff-portnoy is talking about is not at all clear. Perhaps if the answers are not what he needs, he will clarify the question.

Jim

jeff-portnoy · Oct 25, 2012

BBBBill said:
Guys, it seems to me that he's talking about an apparent discrepency between the bore centerline and the chamber centerline. Could be real if the reamer was cocked during chambering and shows up as an uneven throat/leade.

exactly )
ps sorry for my phraseology guys)

discrepancies center axes chamber

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