- Joined
- May 20, 2020
- Member Number
- 424
- Messages
- 1,754
I have my recipe for my 6.5 down pat. Federal brass 140gn Hornady BTHPs, 38.1gn IMR4350, and CCI200 primers set at 2.79" OAL. It averaged .384" 5 shot groups at 100yds over 10 groups. Pretty good. Recently I ran out of CCI200s and couldnt find them anywhere local. Everyone is sold out because of the covid crap and I didnt want to spend $25 hazmat fee.
So I was at the LGS and he had Federal 210 primers in stock. Supposed to be regular large rifle rifle primers so I bought 500 of them. Holy fuck if it didnt completely destroy my grouping. Everything else is the same. Hell even the weather was almost identical with zero wind. My freaking group size opened up to .802 avg over 3 five shot groups. WTF!
i know change one little thing and everything goes to hell. I dont want to ladder test again but I just primed 200 rds of brass. Fuckity fuck fuck!
So I was at the LGS and he had Federal 210 primers in stock. Supposed to be regular large rifle rifle primers so I bought 500 of them. Holy fuck if it didnt completely destroy my grouping. Everything else is the same. Hell even the weather was almost identical with zero wind. My freaking group size opened up to .802 avg over 3 five shot groups. WTF!
i know change one little thing and everything goes to hell. I dont want to ladder test again but I just primed 200 rds of brass. Fuckity fuck fuck!