Since my Cooper should be here soon (I've got my fingers crossed) I am getting prepared. Picked up a bore guide and a new cleaning rod. Collecting brass and buying different propellants to test.
A friend gave me a plastic grocery sack of .223 Remington brass. Range pick-ups mostly, but they were separated by headstamp, Remington every single one of 'em.
I weighed them, one at a time on my calibrated PACT digital scale and I was quite surprised by the amount they varied. Over the course of 315 pieces, a maximum of a five grain difference (90-95 grains) was observed with no outward differences in them.
Here is how they broke down:
91.9 grains or less, 39 pieces for a total of 12%
92.0-92.4 grains, 30 pieces for a total of 9.5%
92.5-92.9 grains, 72 pieces for a total of 23%
93.0-93.4 grains, 110 pieces for a total of 35%
93.5-93.9 grains, 50 pieces for a total of 16%
94.0 grains and up, 13 pieces for a total of 4%
Keep in mind these have been sized/decapped but not trimmed.
I wasn't planning on sorting by weight but after seeing the numbers, I think it would be worthwhile.
Ed
A friend gave me a plastic grocery sack of .223 Remington brass. Range pick-ups mostly, but they were separated by headstamp, Remington every single one of 'em.
I weighed them, one at a time on my calibrated PACT digital scale and I was quite surprised by the amount they varied. Over the course of 315 pieces, a maximum of a five grain difference (90-95 grains) was observed with no outward differences in them.
Here is how they broke down:
91.9 grains or less, 39 pieces for a total of 12%
92.0-92.4 grains, 30 pieces for a total of 9.5%
92.5-92.9 grains, 72 pieces for a total of 23%
93.0-93.4 grains, 110 pieces for a total of 35%
93.5-93.9 grains, 50 pieces for a total of 16%
94.0 grains and up, 13 pieces for a total of 4%
Keep in mind these have been sized/decapped but not trimmed.
I wasn't planning on sorting by weight but after seeing the numbers, I think it would be worthwhile.
Ed