I use an out of the box 2 3/4 870 for slugs. No complaints what so ever. I met Randy Fritz from Tar-Hunt at the Harrisburg show this past year. I have called him about 6 times with no response. Maybe he doesn't listen to his messages. His web site is www.tar-hunt.com I held his product in my hands and very impressed. Before that I was thinking of a 11-87 with rifled barrel and cantilevor mount. Good Luck. Capt Brad.