Sorry to hear of your dirt bike day gone bad and glad you had great EMS folks quickly arrive. I'll be praying for your speedy recovery and looking forward to more wolf hunting accounts!
I had one that shot Hornady factory 75gr VMax so well, I didn't bother reloading. Sub half MOA regularly for 3 shots. Nothing above 90gr. shot under an inch - probably the 1-10" twist.
I think I remember hearing Frank Green (Bartlein Barrels) say on a podcast that when ammo makers, bullet makers, action makers, powder makers, etc. started giving accuracy guarantees - he would start.
Only problem with pre-fit IMHO, it makes it too easy to add another cartridge LOL. I have three pre-fits and two shoot very well and I fully expect the third to once re-crowned - nothing to do with being a prefit.