I have some 147 grain cast 9MM bullets that measure .358 with my dial calipers. The box even says 9MM and .358 but I'm thinking maybe I should use them in a .38 and look for some .356 dia's for my 9MM loads. The owner of the indoor range where I shoot limits loads to 900 fps so I want a load that will cycle my 9MM action and still be under 900 fps. Think I could do this by using 147 grain cast bullets and 3.5 to 3.8 grains of 231? Thanks.