Originally Posted by Puddle

I'm going to however handload the 90 gr. version for my custom .25 Roberts. That barrel has always produced best groups with all my other loads at max velocity.

But, with a mono bullet and specifically the GMX, are there different rules-of-thumb for MV and groups? Does the GMX perform best with full-tilt loads or with loads dialed back some?

Thanks,
Pud



I run em through my Bob and yes, it has worked very nicely at top speeds. I’ve utilized RL-15, IMR-4350, Ramshot Hunter, and Ramshot Big Game, all of which gave excellent velocity & accuracy.