I had tried this earlier in both 308 (175SMK)and 223(77SMK) and the results were not spectacular. I didn't want to burn more powder for the same or less velocity/accuracy result. But Friday I had a quite different experience, as 47.5 gr with the Berger 185 Hybrid gave me results I found hard to believe. My 24" 1 in 10 twist AINA barrel was giving me 2777 FPS average with a SD of 4. I also had three shots in a .0 something hole 100 yards down range. Ambient temp was 88 degrees and humidity was right at 60%. Any one with extensive use of this powder know how it responds with heat/humidity changes? I think I am near max and don't want any surprises down the road.
BTW, I was only experimenting with this powder/bullet combo so that is why there were only three shots. I plan on trying it on a larger scale and at longer distances.
BTW, I was only experimenting with this powder/bullet combo so that is why there were only three shots. I plan on trying it on a larger scale and at longer distances.
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