300 PRC 199gr Stone (Shock) Hammer

[PRCPharaoh]

Yesterday, I shot the 199 Stone (formerly Shock) Hammer with H1000, Ramshot Grand, and Ramshot LRT. It was 82 degrees with 63% humidity. Grand has me excited. I ran it up to 82.2 grains without any pressure signs. A 199-grain bullet running 3100 fps is going to be a vicious combo on any big game I hunt. LRT gave me a little more velocity but it hit pressure around 3140 fps. I was surprised H1000 pressured out when it did. I thought it would have gotten to 81 grains before seeing pressure based on the loads I have seen from others. However, Grand is money in my rifle.

I went in .4 grain increments with all 3 powders. H1000 79.4-81.4, Grand 79.4-82.2, and LRT 90.0-93.6.

Rifle: Bergara 300 PRC 26" barrel
Twist: 1:9
Bullet: 199 Stone Hammer
Brass: Lapua
Primer: Fed GM215M
COAL: 3.40"


H1000
Charge FPS
79.4 3055
79.8 3069
80.2 3094 Light ejector mark
80.6 3085 Ejector mark/Heavy bolt
81.0 N/A Did not shoot
81.4 N/A Did not shoot



Ramshot Grand
Charge FPS
79.4 3007
79.8 2971?
80.2 3016
80.6 3037
81.0 3043
81.4 3066
81.8 3091
82.2 3101 No pressure


Ramshot LRT
Charge FPS
90.0 3075
90.4 3088
90.8 3110
91.2 3110
91.6 3126
92.0 3140
92.4 3134 Ejector mark
92.8 3150 Ejector mark