I've not found the AI's to be any problem whatsoever - quite the opposite, I am rather enamoured with them.

The steps for this one are quite simple.

This one is loaded with 300gr. bullets. The .375H&H on the left, in a factory Silver Tip load, I chronographed in a m602 BRNO at 2,474fps.

The one on the right is my .375/06IMP and it runs 2,472fps average using BLC2 or H4895 & does this with all of the 300's, RN's and BT's.

I've actually been using some of this brass since the mid 1980's - originally .375/06IMP, then necked and FF for my 9.3x62, then necked up again for the new .375/06IMP. The loads have not changed, however the action has and yes- my old brass needs a rest, however it is still working fine.