I have a Kimber Classic 325 - initial load work told me it didn't like boat tails, but I did shoot these groups back to back with 3 different flat base bullets and H4350.

[Linked Image from imgur.com]

My frustration now is I can't get it to group anywhere close to this now and I haven't changed a thing other than try different scopes that are proven on other rifles. I'm debating whether to turn it into a 6.5 PRC or sell it and be done.