Pin gaging brass 101 question

M

mshelton

Member
Those of you that pin gage your necks, if you are working with a 6mm cal and want .002 tension do you use a go gage at 0.241 and a no go at 0.2415 or do you go to a closer tolerance than that?
 
I'm with Al, never heard of pin-gauging necks...... or go/no gauges for case' necks......

I have pin-gauged the chamber to check the actual finished neck diameter. And only used go/no gauges for head-space.
Thinking you may have "neck bushings" confused with pin-gauges?

Donovan
 
He did say the dimension/s were go= .241 & no/go= .2415. At first glance I would think (assume) he was talking about neck ID, in which case he would be correct, but has no correlation to neck od. Therefore, he must be talking about clearance between case neck and chamber neck. Whew! He must be talking about "bushings", but the dimensions are wrong.

Roy
 
I'm presuming your trying to get an accurate measurement from the ID of your case necks for more more consistent neck tension/bullet release. Not sure what you are actually trying to accomplish by using pin-gauges verses OD, but when seating the bullets, the final "seating force" variance should answer your question.

Being curious and dumb-struck to "Pin gauging brass 101", I just took it upon myself to pin-gauge 10-pieces of prepped match brass, that by OD tells me they will have 0.001" tension. I can not get what I would call a consistent enough feel with the pin's to give you a confident answer. And can not see how pin-gauge's are going to tell me anything to actual "spring" force of brass any better then would OD measurements, and frankly can not foresee how I can get an accurate measurement feel with the pin-gauges, or at least I can't at this point.

Please explain "Pin-gauging brass" with some detail..... This is new to me and can't get a feel in doing it, or understanding of what I will accomplish, and must be doing something wrong. I am always looking to improve on my methods of doing things and try to keep an open mind to all aspects. Better consistency to neck tension ranks high with me, and is why I may just be your huckleberry to pin-gauging case necks 101, if I have a better understanding of this illusive method !!!

Thanks,
Donovan
 
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Donovan, "pin gauging" is exactly what you think it is, a method for comparing finely honed holes in massively supported steel stock...... pin gauging brass is like measuring ductile iron piping with a micrometer.
 
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