While a lot of people tout the downfalls of different powders.. IMO Goex is one of the best powders out there. It ignites great, is very consistent, the fouling is soft, and the price is normally better then other powders. I would sure give Goex FFg a try. Start out with the same powder charge as you would Pyrodex RS. Then shoot the same projectile that you had good luck with. From there, build your load. You will probably have to go up in powder charge a little, but I think you will find great accuracy with Goex. Also the idea of fouling is while true, never a problem when I shoot it. I've shot 20 rounds without swabbing when shooting Goex. Your rifle will tell you when to swab. Also you might feel better that Goex actually has a lower flash point then any other powder out there (by Goex I mean black powders). This means better ignition.

If the Goex does not work out, you can always go back to Pyrodex RS which is again.. a great powder.