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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Mega
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<blockquote data-quote="Tidesloe" data-source="post: 3038353" data-attributes="member: 47761"><p>I have a question for you 338 Mega shooters. I have one that is giving me problems and I'm looking for the source of the problems. It's seemed that my neck shoulder junction isn't forming like it should to my chamber, but possibly it's forming like it should. I had expected more of a sharp transition from shoulder to neck, but after 3x fired brass is coming out with a curved radius in that junction I'm wondering. I'm having to bump my shoulders back .006 to chamber brass and I'm speculating that if that transition should be sharper, maybe that's why I'm having to bump so far. After bumping so far that junction looks better, but after firing it's more curved again making me wonder if my chamber doesn't match my sizer die. I pulled my barrel last night, and looked at it, and I'm gonna cast my chamber one evening this week. I was planning on casting my die also but thinking being a bushing die, that alloy might flow between body and bushing. I don't know, we'll see sometime this week. Another think is, this rifle is shooting much worse than any rifle I've ever shot.</p><p>I'm attaching a pic of 3x fired, unsized brass. Does this look normal in the neck/shoulder junction area? It could be that this is normal. If so I'll go back to the drawing board. I'm looking at other possibilities also is why I've pulled the barrel and planning on casting the chamber. There is another symptom as well, but I won't go into that. I just need to know if this brass is forming correctly. Another thought is how can a reamer cut a chamber wrong? Doesn't seem like it can, so there is that.</p></blockquote><p></p>
[QUOTE="Tidesloe, post: 3038353, member: 47761"] I have a question for you 338 Mega shooters. I have one that is giving me problems and I'm looking for the source of the problems. It's seemed that my neck shoulder junction isn't forming like it should to my chamber, but possibly it's forming like it should. I had expected more of a sharp transition from shoulder to neck, but after 3x fired brass is coming out with a curved radius in that junction I'm wondering. I'm having to bump my shoulders back .006 to chamber brass and I'm speculating that if that transition should be sharper, maybe that's why I'm having to bump so far. After bumping so far that junction looks better, but after firing it's more curved again making me wonder if my chamber doesn't match my sizer die. I pulled my barrel last night, and looked at it, and I'm gonna cast my chamber one evening this week. I was planning on casting my die also but thinking being a bushing die, that alloy might flow between body and bushing. I don't know, we'll see sometime this week. Another think is, this rifle is shooting much worse than any rifle I've ever shot. I'm attaching a pic of 3x fired, unsized brass. Does this look normal in the neck/shoulder junction area? It could be that this is normal. If so I'll go back to the drawing board. I'm looking at other possibilities also is why I've pulled the barrel and planning on casting the chamber. There is another symptom as well, but I won't go into that. I just need to know if this brass is forming correctly. Another thought is how can a reamer cut a chamber wrong? Doesn’t seem like it can, so there is that. [/QUOTE]
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338 Mega
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