- 450BM 275xpb2.jpg (27.84 KiB) Viewed 8515 times
UPDATE: It's been a while but I picked up some 275xpb's and plan on using H110, CCI450 primers, and my new ROCK CHUCKER!
I'm looking at an OAL of 2.18" Does that sound right for an AR?
As for the bullet creep, I picked up a hornady taper crimp die and have a lee fcd. I think I'm going to pass on the side crimps for accuracy and just not slam the bolt down every time when I'm hunting. I plan to crimp them down to .474 to get a good bite.
Which crimp is best to use with the xpb's? Both? And finally, how fast are guys safely pushing the 275's with H110 in an AR? Most of the info seems to be for bolt guns. I'm thinking working my way up to 40gr just to find pressure and backing off from there. (I'm working over 1 grain above max for my 250ftx/ Lil' Gun load with no pressure) My 18" barrel seems to be 100fps slower than most listed velocities. Suggestions?
Thanks for all the help. It's frustrating that there is still not a ton of info out there for all these different bullet/ powder combos. Here is a pic for your enjoyment