Julian Brookstein
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- Joined
- Jul 10, 2016
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I recently bought some Norma 550Gr FMJ rounds. Claimed velocity is 2100fps. I put a box through the chrono yesterday and the highest i got was 2044 and the lowest was 1950. I am not happy with such a variance from one box of ammo and am definitely not happy with anything under 2000fps which two thirds of the box was. I am thinking to pull the heads of the rest of the Norma ammo and change powder to 321 to try and get the velocity up. Can anyone help with how much powder to use? Or can anyone tell me if this is even worth doing? Any help much appreciated.