Don't do that. Ask your gunsmith and he'll tell you what to use. But you don't want to do something that might damage your brand new firearm. You might even have your gunsmith work up your AI loads for you so you'll have an idea of the maximum charge you can safely use in it. But your main gain in Ackley Improving is brass life.I read one guy was using full power loads for the improved cartridge to fireform! This sounded crazy to me. Is anyone else doing this?