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Long Range Hunting & Shooting
Shoulder bump problem or no problem?
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<blockquote data-quote="Tac-O" data-source="post: 3013772" data-attributes="member: 109994"><p>Did you measure your neck diameter near the shoulder?</p><p>I'm doing the same thing, but I'm going from 7mm to 30 cal. I found that using Lapua brass instead of Peterson brass that after resizing a case after fireforming The neck diameter near the shoulder junction is significantly larger and in a lot of cases larger than the neck in my chamber. I sharpied up that area and chambered the case, with resistance, and there were no identifiable marks in that area. That measures larger. I did find that there was a very, very tiny thin ring at the shoulder junction where it seems the shoulder junction in the chamber is hitting the case. This happens even though I've bumped the shoulders back. 0.003. so, its almost like the donut exists in the neck/ shoulder junction area as well and shows up when I size the case.</p><p>I'm not sure what to do about it other than neck turning or honing out the rear portion of the neck in my chamber</p></blockquote><p></p>
[QUOTE="Tac-O, post: 3013772, member: 109994"] Did you measure your neck diameter near the shoulder? I'm doing the same thing, but I'm going from 7mm to 30 cal. I found that using Lapua brass instead of Peterson brass that after resizing a case after fireforming The neck diameter near the shoulder junction is significantly larger and in a lot of cases larger than the neck in my chamber. I sharpied up that area and chambered the case, with resistance, and there were no identifiable marks in that area. That measures larger. I did find that there was a very, very tiny thin ring at the shoulder junction where it seems the shoulder junction in the chamber is hitting the case. This happens even though I've bumped the shoulders back. 0.003. so, its almost like the donut exists in the neck/ shoulder junction area as well and shows up when I size the case. I'm not sure what to do about it other than neck turning or honing out the rear portion of the neck in my chamber [/QUOTE]
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Shoulder bump problem or no problem?
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