For the 25×47 Lapua load development, we were using http://blackjackbullets.com published data to begin this process. We started with a 29.0” 1-7 twist barrel blank with 6 grooves from X-cal. We cut the barrel down to 27” and was chambered with a Clymer 25×47 reamer with .130 freebore. Using a .282 bushing for the die sizer die, which yielded .001-.002 neck tension with Lapua Brass.
VihtaVuori N150 Up Next for more testing
Berger 135 Grain Hybrid Target
Anneal your brass before load development
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