The 14th episode of our Mk 262 Mod 1 clone series. Powders for today are Alliant Power-Pro Varmint and VihtaVuori N140. Test bullet is the 77gr Sierra Match King with Cannelure.
In this video we try the Hornady 147 ELD-M with VihtaVuori N550 to see what velocities that we can achieve. Primarily before we start shooting groups we are seeing what velocity we can safely reach before seeing pressure signs. We use CCI-250 primers and Hornady brass and test and show velocity and group data at 150 yards.