My gun is an older SBE1. It kicked like hell when using 3 1/2 mag loads so I sent it off to a gunsmith to port it and extend the forcing cone. It shoots nice now. Ordinarily I don't go for anything ported but I only shoot the thing a few times per year on the range with ear protection and when I hunt. I had them make a custom choke that was (.660). I got it from Ballistics Specialties in Battesville, Arkansas. I can pattern better with that choke than with stock full choke or the two others I bought. The last one I bought was due to the fact that I was going to try Hevi Shot and someone told me I needed a special choke. I have tried all sorts of combinations with shells and chokes and came back to the newest Federal offering with my .660 turkey choke. I like the way it shoots and patterns now and figure I have it the best it will ever be. Great gun especially for turkey since it is so light and you can crank out the shots if needed.