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primer pocket

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13 August 2005, 19:55
vines
primer pocket
WILL A MAG PRIMER ENLARGE A NON MAG CASE PRIMER POCKET?
13 August 2005, 20:06
El Deguello
quote:
Originally posted by vines:
WILL A MAG PRIMER ENLARGE A NON MAG CASE PRIMER POCKET?


NO! They are both the same diameter! What will enlarge a primer pocket is excessive pressure! And this can happen regardless of the kind of primer you are using.


"Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen."
13 August 2005, 20:46
rejpelly
No;but remember that Federal(largest diameter),CCI(medium) and WLRM(SMALLEST)...
14 August 2005, 13:56
vines
I heard that was the reason for the belt around a mag case, like the 300 win mag and 7-mm rem. mag because of the extra pressure in the bottom end, in a primer pocket. i'm talking primer pockrt only
14 August 2005, 14:08
buckshot
No, the belt serves only to provide a means of head space. The savvy reloader adjusts his size die to allow for head space in a conventional manner, from the shoulder.
14 August 2005, 15:49
eddieharren
Some years ago a friend of mine made a long range PD cartridge by necking down a 7mm Mag case to 6mm, blowing it out to a 35 degree shoulder and, turning the belt off. The cases without the belts developed loose primer pockets after 3 firings. He went back and cut the belt in the chamber, made some new brass, with belts, and the loose primer pockets were no longer a problem.