It was getting dark so I had to rush a little. My first hand loads with my new gun.
The top two groups were: Powder imr 4064 27.5grs with 32gr sierra.
The bottom groups were: Powder imr 4064 27.5grs with 32gr hornadys.
Each group has five shots.
When I shot the bottom groups it was almost dark and the gun was a little warm.
Thats some pretty nice shooting chuckhunter with that first sierra gruop you shot for your testing. If that was me now i would do the same test. But i would shot the hornady loads first just to make sure. That it was the sierra bullets that was working better in your gun with that load. All my summer shooting i do is just testing different loads i come up with. Thats what i like to do when i'm off work but thats all up to you. Have fun,
Nice shooting Chuckhunter. I'm glad to hear IMR-4064 is working good for you, it's not a powder we hear being used in the .204 often. When I check my Burn Rate Comparison Chart it lists IMR-4064 directly above Reloader 15, meaning it is just slightly faster than it (but basically the same). Just two powders above IMR-4064 is N-135 which some shooters are using with great success. Seven powders above (faster) than IMR-4064 is H-4895, the powder that I am using in my .204 (after considerable testing).
So, it is right in the ball park in terms of burn rate for premium accuracy in the .204, maybe a bit on the slow side. Being a bit slow (in burn rate, not velocity), you might find that it will shoot the heavier bullets (39 & 40's) better than the 32's. Anyway... thanks for the info and the pictures! What primers are you using in this load?