Hey Drew, your barrel's on it's way. Anyway, any jacketed bullet should shoot good in it. I had some 180 Grs for it and now I'll have to use them in my Ruger Redawk if I don't trade or sell it. For now I plan on keeping it, but you never know.
I was on NEF's web site to see if I could find the rifling twist rate, but was unsuccessful. The rate will help decide if the heavier bullets are better.
I never did, but because of how those guns are guilt, you could really hot-rod some ammo if you want to.