6-250AI and Berger 108s

[RV-Customs]

Does anybody have starting load data for 6-250AI running Berger 108s?

I have been doing some testing recently and have been encountering hard bolt click while running the 108s with H4831SC, Lapua SP brass, and CCI 450 primers. I've check the chamber length and brass has been trimmed back sufficiently, case necks loaded are .003" under chamber diameter.

 

[tclaunch]

Sounds like a die problem, not sizing the base of the case enough.

 

[swd]

What Tim said ^^^ Bolt click is almost always the case head area isn't sized enough. In other words you need a small base type die.

 

[RV-Customs]

Gotcha, I had a custom FL die made by Whidden, but i didn't specify small base. I have a 6BR small base die I can ream the shoulder out of leaving the last .250" and give it a try.

I was getting great groups and 1.5fps SD around 43.3gr but the cases refused to extract.