nddodd
Well-Known Member
What is a normal amount of case stretch in a rifle that is headspaced correctly. Mine is stretching .005 just wandering if this is good or bad.
Thanks fellas,
Nathan
Thanks fellas,
Nathan
What is a normal amount of case stretch in a rifle that is headspaced correctly. Mine is stretching .005 just wandering if this is good or bad.
Thanks fellas,
Nathan
Im wandering if I have excessive headspacing or not.
The difference between GO & NO-GO in the .30/06 (and its cousins) is .006" For the .308 Win. (and its cousins) it is .004". The Weatherby Mags. is .003". The only way to check headspace is with fixed, tool steel gauges.I would think that .005" is very normal for a once fired case. I've seen that much expansion/stretch in alot of factory guns.
I believe the allowed varience in factory chambers (SAAMI specs) is .010" between go and no go.
I've been using them for many years in factory chambered guns. For the simple fact that some factory chambers are on the excessive side.
The difference between GO & NO-GO in the .30/06 (and its cousins) is .006" For the .308 Win. (and its cousins) it is .004". The Weatherby Mags. is .003". The only way to check headspace is with fixed, tool steel gauges.
Hey,,, I'm just full of little tidbits of obscure info. That .006" tolerance must be the limitation the brass as it is still the limiting component for the pressures that are generated as the propellant burns. The higher the pressure the tighter the working tolerance. We count on the brass case to stretch and then contract some, so it can be extracted from the chamber. By design and by the nature of brass. I would suspect case stretching, like the OP asked about, comes from high pressure cartridges or 'generous' chambers or both. .005" 'growth' wouldn't bother me too much, but, when I resized those cases I'd only re-size enough to ensure reliable function in my rifle. That will help limit 'growth' and/or hard brass for future reloadings.Thanks for the correction, I didn't realize it was that small.
I still recommend the Precision Mic, because you can use it to set up your reloading dies for whatever headspace you have......excessive or not.
Hey,,, I'm just full of little tidbits of obscure info. That .006" tolerance must be the limitation the brass as it is still the limiting component for the pressures that are generated as the propellant burns. The higher the pressure the tighter the working tolerance. We count on the brass case to stretch and then contract some, so it can be extracted from the chamber. By design and by the nature of brass. I would suspect case stretching, like the OP asked about, comes from high pressure cartridges or 'generous' chambers or both. .005" 'growth' wouldn't bother me too much, but, when I resized those cases I'd only re-size enough to ensure reliable function in my rifle. That will help limit 'growth' and/or hard brass for future reloadings.
I guess I shouldve explained it in different way, Im wandering if I have excessive headspacing or not. Using nosler brass in .243 win unfired then firing and measuring the shoulder of the 2 there is .005 diff. Of course the fired being longer. Just curious if .005 is normal or should it be less if headspaced correctly.
Thanks,
Nathan