Reply to Thread

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Message: <blockquote data-quote="uncle money bags" data-source="post: 2526165" data-attributes="member: 8377">Here is my 2 cents worth. This is from experience.If you are getting a ring around the bullet when seating, then the neck tension of the case is too tight. Or, it maybe that the inside of the neck is scarred. When this happens part of the seating depth is absorbed by the crushing of the bullet jacket. I first noticed this when seating much longer 77 grain bullets, especially the thinner jacket Nosler Custom Comp bullets. Any time the seating operation was tighter or there was more resistance then the seating die would leave that ring and the OAL of the round would be off. This caused my OAL to vary between 2.250 to 2.265. As it happens, PMAGS will still take the longer bullet and I have observed no issues with the longer rounds.If you are having this problem, especially with the considerably shorter and easier to seat 55's I would look at your sizing die first and make sure it is clean, in spec, and lubed correctly. It may also be that your trimming tool is scarring the inside of your neck and causing the issue. I had that problem with the RCBS Trim Pro. To rectify I removed the guide and chucked it into a drill. With a piece of leather and a mild compound I polished it taking care to not remove any more material than was necessary to get a bright shine. Another issue with mixed brass and the trim pro is that the mandrel doesnt always line up well with the base holder. To fix this place the brass in the holder and leave it slightly loose until you insert the mandrel. with the mandrel in the neck let the arm of the base holder take bite and then start trimming.Anyway, hope this helps.</blockquote>

Verification