08-31-2020, 01:41 PM
(08-26-2020, 01:20 AM)Pig_Popper Wrote: I may test a weapon system in the future in 6-ARC for a local gun manufacturer.
But in terms of spending my own money on gear / yeah I’m out.
I have a 6mm Grendel barrel in route - I’ll do this the old fashioned way and get Lapua brass, a maxim bolt, and full Grendel case capacity for powders.
It should outpace the 6-ARC load data velocities by 200 FPS
The only way you're going to get another 200 fps out of ~3.2% more case capacity in a 6mm Grendel is by exceeding Hornady's pressures. The Hornady data does indeed seem anemic and is likely conservative. It would be nice if they listed pressures. And us wildcatters have probably been running over pressure.
Anyone using charges in the range of Whitley's data certainly has. His starting points are around Hornady's maxes.