Ran out of 45acp 230 grn r/n bullets,but had a large quantity of 45L/Colt flat nose 253 grns on hand. As they had to be seated much deeper to feed ok I reduced the load by10%, resized the bullets to 451 and at 25yrds had the most accurate shoot in my std 1911 that ive ever had.Not going to bother with the 230s anymore.