Where I get my loading supplies they are all out of small pistol primers. I'm new to the game still so my recipes call for small pistol primers for 9mm. Can you substitute those for small pistol primers magnum? For instance the recipes call for cci 500 can I use cci 550 or Winchester small pistol can you substitute and use wspm? I know that the magnums are hotter but ill they have the same effect. Or do you back off on powder a bit to balance the load?