A picture is worth a thousand words...
This is from a Savage 12FV with factory 26" 9 twist varmint contour barrel, in a BC A2 Medalist stock with CDI DBM; 2.46" COAL represents a 0.005" jump.
First four shots into 0.25" @ 100yd...and
of course I went and shanked the 5th shot, opening the group up to 0.62".
24.8gr Varget at both 2.46" and 2.45" (not pictured) produced 5-shot averages of 2933fps, and groups that had 4 shots inside of 0.4" with a fifth opening things up to 0.6-0.65".
25.0gr @ 2.45" wasn't as good as the above three loads, but still showed promise putting the first three bullets at the same velocity into 0.2", with average speed of 2962fps.
25.2gr produced average velocities of 3000fps, but accuracy wasn't great and I was getting pierced primers (but no other pressure signs????).
I look forward to fine-tuning inside the 24.5-24.8gr node, and testing these at 300yd+.
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