Assuming that you are using H&G68 or similar, an oal between 1.255 and 1.260 should work. Personally, in 2, 45 automatics, I load the above mentioned bullet to an oal of 1.260- 1.262. Shoots accurately, (IPSC and IDPA), feeds fine. Try to hold 1.260.
If you want powder charge, inquire via email.