Thread: Lupo 30-06 load development "the lone wolf"

Originally Posted by chainsaw

Have you weighed your new brass & how does the weight compare to old brass you were using? I think MD is probably on the money, the new brass is heavier thus thicker walls, less internal capacity reaching pressure earlier and more fps for same powder load. In my 6506ai and different brass (Norma vs RP) there was about 10gn difference in weight of brass and that needed about 1gn difference in powder to compensate (ie find accuracy node).

Yup it's on the previous page of this thread, and similarly there is 9gn difference in weight between the sako brass and the Starline brass with the Starline being heavier and thus likely thicker walls etc.
It has crossed my mind that maybe I should try dropping my charge weight till I get the same velocity as the sako brass from results already seen above it would seem dropping my charge weight by between 1gn and .7 of a gn should see me in the ball park. I might try this before doing another full ladder