So I picked up a (well used) Plainfield M1 carbine last Friday and spent most of last weekend tearing it down, ordering parts, and cussing the bolt assembly as I was putting it back together. I ordered some Lee dies and Starline brass, and I have some range brass I've picked up here and there. I also have some 110gr plated projectiles from Everglades I want to try, as well as some h110 and IMR4227. Anybody have experience with these powders? What about the trim length on the brass? All the brass I have is shorter than the trim to length in the manuals, including the brand new Starline brass. Trim to is listed as 1.286", but I have lengths varying from 1.274" to 1.285". I haven't sized any yet; I'm wondering if this is one of those brass types that actually shortens on firing. School me.