I think you may be being a bit too technical for a 375.
A Brno 375 is not a Varmiter.

I have ownd 5 Brno's (550 and 602's) and all have shot
with all shape of bullets.

I just shove powder in case, seat bullet and shoot
and they all shoot 1 - 1.5moa without a problem.
I then work from there to get better accuracy but in
reality I think most 375 + shooters should spend more
time practising shooting the gun and less time
worrying about Sub Moa loads in a 375.

After all, so what if a load is Sub MOA if the person's
wobbles are 3 MOA at 100 Yards

And as to boat tales, BT's weaken a jacket
and BT's don't have any affect until 250+ yards
anyway and you shouldn't be shooting game at that
range anyway.

500 Nitro