30-378 load

Windtech1

Member
Joined
May 25, 2012
Messages
11
Location
far northern ND
I'm loading for a 30-378 Accumark. I'm using Retumbo, Berger 185 VLD. Berger manual max load is 107.5 gr but only 3184 f/s. I want to reach speed top speeds, around 3400 f/s. I do not have a chronograph but do know how to look for overpressure. I'm hoping somebody would share previously worked loads for this specific rifle, powder, bullet combo.
 

Windtech1

Member
Joined
May 25, 2012
Messages
11
Location
far northern ND
Used 110 gr Retumbo, 185 gr vld, Win LRmag primers. Got sub MOA @ 500 -- 3.75" group with a drop of 4 [email protected]. 300yd zero and 2" high @100 yd. No chrono but using data in Berger ballistics estimated velocity is 3350f/s. Excellent load, zero pressure signs on primer or brass.
 

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