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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ejector marks
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<blockquote data-quote="Remnut3477" data-source="post: 2719067" data-attributes="member: 94820"><p>Hey fellas, new guy from Wisconsin. Hopefully I can add some insight to the problem at hand. This is my rifle. It is a Remington 40x with a Bartlein 28" 1/8 twist, .269 neck. The load is New Peterson brass, first firing, I mandrel the necks, debured and chamfered them, uniform primer pocket depth and debured the flash hole. When I acquired this rifle it didn't have a ejector in it, so I installed one from Gre-Tan. We started load development at 31.8grs of Varget with a CCI 450 primer and . 010 off the rifling. I went in .2gr increments up to 33.6gr. Loaded 50rnds. The ejector mark was always there, from the first shot, it's faint, very faint. No hard bolt lift, no flattened primers, no other signs. It was shooting great, like 5 shot groups in the 2s great, with two different shooters. Now it all changed with the second box of 50 brass, (the ones in the pic) same lot as the first, same case prep. I loaded 10rnds each from 32.2-32.7. It started piercing primers and even a few didn't ignite. We know it's a pressure problem, but from where? And why the big change?</p></blockquote><p></p>
[QUOTE="Remnut3477, post: 2719067, member: 94820"] Hey fellas, new guy from Wisconsin. Hopefully I can add some insight to the problem at hand. This is my rifle. It is a Remington 40x with a Bartlein 28" 1/8 twist, .269 neck. The load is New Peterson brass, first firing, I mandrel the necks, debured and chamfered them, uniform primer pocket depth and debured the flash hole. When I acquired this rifle it didn't have a ejector in it, so I installed one from Gre-Tan. We started load development at 31.8grs of Varget with a CCI 450 primer and . 010 off the rifling. I went in .2gr increments up to 33.6gr. Loaded 50rnds. The ejector mark was always there, from the first shot, it's faint, very faint. No hard bolt lift, no flattened primers, no other signs. It was shooting great, like 5 shot groups in the 2s great, with two different shooters. Now it all changed with the second box of 50 brass, (the ones in the pic) same lot as the first, same case prep. I loaded 10rnds each from 32.2-32.7. It started piercing primers and even a few didn't ignite. We know it's a pressure problem, but from where? And why the big change? [/QUOTE]
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