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**Mike Irwin** · April 7, 2014, 09:27 PM

Accuracy does demand consistency, but it rarely demands absolute, slavish repeatability in weights.

The most accurate load I ever put together in my .243, a true quarter inch load if I did everything right at the trigger, had a swing of nearly a grain in powder weight - half grain low to half grain high.

The big secret, I found, was tapping the ammo box, case head down, gently on the table for about a minute before shooting.

That compacted the powder to the same degree in the case.

I never sorted my brass by weight, I never sorted my bullets by weight. I did all of the standard prep actions, but didn't go out of my way to micro-debur the case mouth or anything like that.

April 7, 2014, 09:27 PM	#36
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,390	Accuracy does demand consistency, but it rarely demands absolute, slavish repeatability in weights. The most accurate load I ever put together in my .243, a true quarter inch load if I did everything right at the trigger, had a swing of nearly a grain in powder weight - half grain low to half grain high. The big secret, I found, was tapping the ammo box, case head down, gently on the table for about a minute before shooting. That compacted the powder to the same degree in the case. I never sorted my brass by weight, I never sorted my bullets by weight. I did all of the standard prep actions, but didn't go out of my way to micro-debur the case mouth or anything like that. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.