I’m running a 22” JP LRP-07 in 6CM w/ a 7” Ulta 30 TBAC can. I’m running 38gn of H4350 w/ 108ELDM @2740ish FPS and it shoots about 1/4MOA if I do my part. I’m just running Hornady brass as I have a metric shit ton of it. If I don’t run suppressed, I can get the 108’s comfortably close to 2950fps. I slowed it way down to try and save some barrel life. I would have way better luck with Lapua SRP brass, but I’m cheap lol.
Be diligent with keeping the neck in the chamber area clean and free of that nasty carbon ring. You’ll know if you get one, as your velocity and pressure will go through the roof.
I’ve tried 107 SMK and 108 Scenar L with fantastic results as well.
If you’re gonna run a can, When you find a good load, run it for as long as you can. When it goes to shit and you start getting pressure, clean it good. That will be a good average runtime/cleaning cycle for it.
When I get time, I’ll post all of the loads I’ve tried.
That being said, great luck with H4350...not very good with anything else,ie Varget, H4895, 4831SC. Decent results with IMR4064, it’s just too temp sensitive for a gas gun