I bet your friend hasn’t experienced issues with a 9.3 w reloder 17
A 338wm for example will go from 64k to 93k with a small adjustment w R17
It is hard to get to 70k misloading and doing everything wrong in a 9.3 w R17 and 250acubond
Take that with a grain of salt,
If you need or want all out velocity in a 9.3, this is the powder
I have a 20” barrel, and want 2700fps w 250’s so that is why I use it,
When I go to Africa I need 2510fps w 286 from a 20” barrel sends me to R17
I have a couple hundred rounds or more thru my CZ550 w R17 w no problems, It seems to work well w my set up and goals
Some guys say they keep a dope chart for temp, some say they adjust 0.2g for temp, Some don’t like that, some won’t use the powder
I sighted it in for Elk today w 250’s pushed by r17. Off a bipod, w a rolled up sweatshirt at the butt, first group was 3” at 375yards, the ave of the 4 groups was 1moa, I got a little flinchy at the end or it would have been better
There are other powders that are very accurate and temp stable, but the velocity is just a little slower
