You're going to love it. Dave has probably already told you this, but just in case he hasn't - the first thing you should do with that GP is take out the Lyman touch hole liner and replace it with one from RMC that uses an allen wrench to install. It has a slightly larger hole and the socket for the allen wrench acts like a funnel to channel the pan flash to the main charge. I've now had more than 500 shots out of my GP and have had exactly two flashes in the pan. In both cases the touch hole was blocked with a piece of crud that I failed to notice when I filled the pan, and I never "pick" the flash hole unless I see crud.
Click here
http://rmcsports.com/catalog.htm and type
touch hole liner in the search box in the upper left hand corner of the page.