[quote=NMScout308 Case head expansion was the same as my reloads which are not nuclear: new case .420 fired case .465. All cases compared were Starline. I’ve read that Underwood is using 800X for this load. I’ve always used Longshot, Blue Dot and AA#9, I guess I’ll give 800X a try. [/quote]
.465"?? I hope that is a typo! Any case head expansion OVER .435" is considered HOT! I just purchased a XDm 5.25" last week and have yet to fire it. I have some 180gr. XTP's loaded with 800-X, Longshot and Blue Dot. From the multiple chat forums on 10mm loading it seems to me that Longshot is the most consistent. Most guys that load 800-X weigh each charge as it has very large flakes and doesn't flow thru meters very well. If I get 1300fps with my longshot load, that will be my hunting load. I have a few other powders to burn up for range loads with Berry's 180gr. plated bullets.
Happy handgunning!
Elk Country
