ihmsa70,
I am using mixed brass with a lyman 311291 with a gas check. The alloy is unquenched wheel weights cast at about 850 to 900 degrees. I increase the heat just enough to get them frosted a little. Powder is 31 gr or IMR 4831 and primers are CCI Large Rifle. velocity is 1750. This bullet weighs right at 180 gr from my mold.
I tried 10, RCBS 30-180-fp at the ram distance, 200 yards, on Saturday and they consistently hit the rams but I couldn't measure the group because it was just knocking down the targets that were left up after the match. My spotter said they were striking the Rams, centered, just about 3 or 4 inches lower than the Lyman bullets were.
Sixgun