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Rifles, Reloading, Optics, Equipment
7mm STW
7mm advice
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<blockquote data-quote="stapleen" data-source="post: 937655" data-attributes="member: 31736"><p>Mudrunner, thank you for the response. This chamber is cut to spec. This is a Rem Sendero in 7mm mag. I once thought what you did when I first tried to reload for this rifle. A headspace measurement taken with a Hornady headspace gauge on new Rem unfired brass was x measurement. A once fired piece of brass measured with the same gauge was now x+.018". My group size was around an inch at 100 yards. I took all the once fired brass and full length sized it using a Redding .015" over shellholder, thus bumping the shoulder back .003", and my group size decreased to 3/8". I thought I had some sort of screwed up chamber, so instead of being smart and researching this scenario, I took the rifle apart and recut a 7mm rem mag saami spec chamber in this barrel with a brand new pt&g reamer. Guess what I found when I put it back together. You guessed it, the exact same condition. I have since researched this on the internet and this problem seems common amongst 7mm mag owners. </p><p></p><p>My question is not whether or not this condition exists, its whether or not this condition also exists in a 7mm stw.</p></blockquote><p></p>
[QUOTE="stapleen, post: 937655, member: 31736"] Mudrunner, thank you for the response. This chamber is cut to spec. This is a Rem Sendero in 7mm mag. I once thought what you did when I first tried to reload for this rifle. A headspace measurement taken with a Hornady headspace gauge on new Rem unfired brass was x measurement. A once fired piece of brass measured with the same gauge was now x+.018". My group size was around an inch at 100 yards. I took all the once fired brass and full length sized it using a Redding .015" over shellholder, thus bumping the shoulder back .003", and my group size decreased to 3/8". I thought I had some sort of screwed up chamber, so instead of being smart and researching this scenario, I took the rifle apart and recut a 7mm rem mag saami spec chamber in this barrel with a brand new pt&g reamer. Guess what I found when I put it back together. You guessed it, the exact same condition. I have since researched this on the internet and this problem seems common amongst 7mm mag owners. My question is not whether or not this condition exists, its whether or not this condition also exists in a 7mm stw. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
7mm advice
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