How can we tell?
Without knowing your OAL there is no way to tell if it is a good load or not. OAL dictates pressure just as does bullet weight and powder charge. Start at the recommended minimums and work up, observing the OAL given in the manual.
Win231/HP38 is an excellent powder for 45. 45ACP is a pretty forgiving cartridge and one of the easier reloads to make. Good luck.