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Rifles, Reloading, Optics, Equipment
Reloading
7mm STW case problem?
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<blockquote data-quote="lloydsmale" data-source="post: 626892" data-attributes="member: 41442"><p>I guess im confused. What brass are you FIREFORMING into 7stw. What caliber brass is it? Is it new brass? Most case head seperations are due to brass flowing toward the neck after mulitple firings. things is with most magums ive loaded through the years is that the primer pockets usually give out before they even come close to seperation at the base. If its new brass id guess that excessive headspace is your problem. cant you measure your brass after firing it and compare the measurement between the rim and the start of the neck on them and a piece of brand new stw brass to see if your shoulders are being blown foward excessively. Even on a gun with a bit of excessive headspace you can get by by backing off on your sizing or neck sizing the brass. Ive got a #1 in 2506 thats has a bit of excessive headspace. If i used once fired brass that was fired in a tighter gun it stretches enough even on the first firing that i get a shinny ring around the base and seldom get more the two firings without it comming close to seperation. What I do with it is buy new brass and shoot it first with a starting load and then neck size. If it gets to the point after a few firings that it doesnt want to chamber easily i then will full lenght size but make sure i ajust my dies so i dont bump the shoulder back. Many shooters of mag rifles still use the old school thought of it headspacing on the belt. this will shorten the brass life substantialy. Size your brass to fit your chamber and youll get much better brass life.</p></blockquote><p></p>
[QUOTE="lloydsmale, post: 626892, member: 41442"] I guess im confused. What brass are you FIREFORMING into 7stw. What caliber brass is it? Is it new brass? Most case head seperations are due to brass flowing toward the neck after mulitple firings. things is with most magums ive loaded through the years is that the primer pockets usually give out before they even come close to seperation at the base. If its new brass id guess that excessive headspace is your problem. cant you measure your brass after firing it and compare the measurement between the rim and the start of the neck on them and a piece of brand new stw brass to see if your shoulders are being blown foward excessively. Even on a gun with a bit of excessive headspace you can get by by backing off on your sizing or neck sizing the brass. Ive got a #1 in 2506 thats has a bit of excessive headspace. If i used once fired brass that was fired in a tighter gun it stretches enough even on the first firing that i get a shinny ring around the base and seldom get more the two firings without it comming close to seperation. What I do with it is buy new brass and shoot it first with a starting load and then neck size. If it gets to the point after a few firings that it doesnt want to chamber easily i then will full lenght size but make sure i ajust my dies so i dont bump the shoulder back. Many shooters of mag rifles still use the old school thought of it headspacing on the belt. this will shorten the brass life substantialy. Size your brass to fit your chamber and youll get much better brass life. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7mm STW case problem?
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