220Gr RNSP loading

[GunGeek]

Here are results from my first attempt loading for the 300Whisper. Brass was Federal Premium 223 sized and trimmed to 1.385, Bullets were Sierra ProHunter 220Gr RNSP 2.210"OAL, Win small rifle primers, VV N-530 powder. (I like to have zero dead space or even slightly compressed load for most repeatable muzzle velocities)

Environmental: 64'F, 72%RH, 650'AMSL

This was shot out of a Model 1 Sales 16" barrel on one of my FrankenAR's. (1.408" chamber cut, 2.295" OAL with this bullet)

I only shot 2 rounds at each loading so no variability data. I just wanted to see where I was on the velocity scale before choosing a load to put more work into. Now I'm back on the road for a while so no telling when I'll get to work up more rounds.