I posted a question about combo guns sometime back and after much thought decided not to buy the SPR 94 I asked about and decided to go with the Valmet 412 as suggested. Well now I have more questions, first is the 412 chambered for 2 3/4 inch only shells or do they have 3" chambers. Next how are they choked and how difficult is it to have choke tubes installed if wanted. Finally is there somewhere that kind of specializes in 412s, I have not been able to located one and there have only been a couple on the auction sites. Thanks for your help again.