i have been thinking about this, has anybody ever tried light charges of 4F as the main charge in say a 40 cal. or smaller. and if so, how did it shoot? if the average load in a 40 is about 40gr. i would think you should be able to shoot 20-25gr. with no problem. and yes, i have a couple of cans of 4F i need to burn,,,,,,,,,,,,,,,,