I am getting ready to either buy a new HD type shotgun or convert an older 870 Wingmaster into one. I have a few questions for the experts: 1. Are there any "dimple" issues in the magazines of older Wingmasters when it comes to adding magazine tube extensions? By older I mean like 50's-70's type Wingmasters or even a Wingmaster Magnum. 2. When it comes to choke; is there a preferred choke for Buckshot and Rifled Slug use? Is it better to have a barrel that is just one choke, or to have a RemChoke Barrel? I am thinking of a do it all type with a 20" Barrel. If it has RemChokes I could use it as turkey gun too. The reason I am asking is because I have seen numerous different barrels offered on places like GunBroker and I would only like to buy once. Thanks for taking the time to read, I am looking forward to the responses.