From Ross Seyfried back in 1981. He said he used this load and 2 identical Pachmayr 1911s for all of his 1911 IPSC work.
.45 ACP, 5.7gr WW 231, 230 gr bullet.
I ran 100,000+ of these with various cases, LP primers (mainly WW and CCI) and both lead and jacketed bullets. Ran fine in 1911, GL21, GL30, Sig 220.