The Firing Line Forums - View Single Post - What does it mean +/- .1 grain ?

RickB · March 25, 2020, 05:50 PM

It's a combination of all of the above. If you accurately adjust your powder measure, accurately zero your scale, accurately read the scale, etc., etc., your charges will vary by up to two tenths.
That's why, when developing loads, you increase in .2 grain steps.
It's also why I measure ten charges before deciding my load is where I want it; one charge appears to weigh, say, five grains, but ten charges weigh 49 grains?

March 25, 2020, 05:50 PM	#14
RickB Senior Member Join Date: March 1, 2000 Location: Boise, ID Posts: 8,518	It's a combination of all of the above. If you accurately adjust your powder measure, accurately zero your scale, accurately read the scale, etc., etc., your charges will vary by up to two tenths. That's why, when developing loads, you increase in .2 grain steps. It's also why I measure ten charges before deciding my load is where I want it; one charge appears to weigh, say, five grains, but ten charges weigh 49 grains? __________________ Runs off at the mouth about anything 1911 related on this site and half the time is flat out wrong.