Struggling with load for .243win using 80Grain Berger Varmint
I have been doing some load testing and want to generate a load for my .243 using 80grain Berger Varmint Bullets.
Yesterday I made 27 bullets up with Varying loads of H414 from 42>>>46grains of H414.
I managed to get 2 tight spots at 42.5 grains and 46 grains and they were really good. The 42,5 grains gave approx .6" at 200yds and the 46grains gave a one hole group at the same range.
To prove the load today I made up 9 bullets of each and shot them in 3x3 shot groups and the groups went from good to bad to good to awful.
The cases were new Lapua cases, the primers were fed210m's the bullets were seated 10 thou back from the lands and the rifle is a Tikka T3 Super Varmint with a 1 in 10 ywist barrel.
Whats going wrong ???
Can you recommend to me a load that will get me tight groups in my rifle using the 80grain berger pills ???
I am considering Varget and H4350 ???