The Firing Line Forums - View Single Post - Effect of trim length variance on non-crimped loads

Poodleshooter · February 12, 2002, 01:45 PM

Cases are all the same lot of Malaysian soft 5.56 brass. It's crap brass that I cut and primed in a hurry for FMJ plinking loads (which I have subsequently given up on due to my HBAR barrel's propensity for destroying light 55gr bullets). The headstamps are barely readable, and there are extractor marks on the rim, but there are no interior rings or other imminent case failure signs. I've segregated them into batches with differences of .003", and loaded them with several test loads using WC846 (BallC2), AA2495 and 2520, CCI SR primers and Hornady 68gr BTHP match bullets loaded to 2.255 OAL. I'll report after firing them over the weekend. Powder weight data was from Hornady and Accurate Arms, but conflicts by nearly 10% with Sierra data for the same bullet weight, so I will refrain from posting it.

February 12, 2002, 01:45 PM	#4
Poodleshooter Senior Member Join Date: August 7, 2000 Location: Floating down the James River in VA Posts: 2,599	Cases are all the same lot of Malaysian soft 5.56 brass. It's crap brass that I cut and primed in a hurry for FMJ plinking loads (which I have subsequently given up on due to my HBAR barrel's propensity for destroying light 55gr bullets). The headstamps are barely readable, and there are extractor marks on the rim, but there are no interior rings or other imminent case failure signs. I've segregated them into batches with differences of .003", and loaded them with several test loads using WC846 (BallC2), AA2495 and 2520, CCI SR primers and Hornady 68gr BTHP match bullets loaded to 2.255 OAL. I'll report after firing them over the weekend. Powder weight data was from Hornady and Accurate Arms, but conflicts by nearly 10% with Sierra data for the same bullet weight, so I will refrain from posting it.