Powder equivalent Win and lake City

wbstx11 · Dec 4, 2015

I just started loading for my Ruger American 308; this is just my own challenge to see how accurate I can get. I loaded up a min/max spread or 5 rounds each at 1/2 gr increases for Varget with Barnes 165gr TSX BT. Started at 41 gr and went to 45 gr. The goal was to get close on a powder charge to do a finer spread. All loads were with new Winchester brass and CCI LR primers. I determined 43gr should be the center of my next series (42.5 to 43.5) with 0.2 gr jumps maybe only 1 gr min/max? Question: if I use Lake City mil brass, what would be the recommended change in powder charge to roughly duplicate the same charge in the Winchester brass?

rcmodel · Dec 5, 2015

Your guess is as good as mine.

No way to tell you that, even if you knew the exact case capacity of each one.

Military 7.62 brass is usually heavier, and of less capacity.
But not always.

But to my knowledge there is no exact rule on how much less powder it takes to get the same results.

You just have to spend powder, primers & bullets testing loads to find out in your rifles barrel & chamber.

rc

cliffb · Dec 5, 2015

Reduce your loads about .4 grains if using Lake City or Federal brass.

jwrowland77 · Dec 5, 2015

There's really no way to tell.

When changing any component within the load, I was taught to start at the beginning again. Start low and work your way up again. No need to start at anything less than the minimum. Just start their and you'll be good.

Powder equivalent Win and lake City

wbstx11

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rcmodel

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cliffb

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jwrowland77

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