300BlkTalk

Been out of the blackout game for a bit and playing with the 277 wolverine. I see Maker has an 85gr Trex out. Is 2400fps a realistic velocity from a 10" barrel using 296 or h110? Anyone have data with that particular combo?

I got 2223fps with their factory loads out of my 6” AR15 with a 762-SDN-6 on it.

They advertise 2550fps out of a 16” tube for this load.

I’m not sure what the extra 4” will give you over the 6” velocity, but hopefully this will give you an idea of what is possible.

With a 10.3" barrel I'm getting 2300fps and 1k ft/lbs, no malfunctions and full cycling using WW296. I seat to the ring on the bullet and give a slight crimp into the ring with a LEE Factory Crimp die; no major crimp. Accuracy with a red dot is 1" @ 50 yards and I might be measuring what my old eyes can do with the red dot. More than sufficient for HD at near bad breath distance.

I didn't keep full notes, but I remember the velocity pretty much plateauing with more powder, with an increase in pressure, so I just backed the load down to the base of the plateau. I'll let you work up your own load but that's what I remember.