Loaded and tested 6.0, 6.2, and 6.4 gn of CFE with 230 gn 45 acp, zero JHP, COAL of 1.20". All test rounds fired well out XDS and 1911. The 6.4gn rounds chrono'd at 840 f/s with the 1911, and 794 f/s with the XDS. I may test a 6.5 gn round, but overall I am pretty happy with the 6.4.