my main trap gun is a BT-100, but i own quite a few trap grade gun and three skeet guns and a lot of field shotguns and i love to shoot them all,for 12ga i have a mec 650 and a mec 9000g,i buy the 20-16ga shells. i have shot many 25,s and quite a few 50,s, but no 75 or 100,s, 74-75 and 97-100 are my best and at 69 i don,t think i,ll ever clean a 75 or 100. i started shooting trap with a field 500 mossberg in the early 60,s and never got into the 20,s, but shot a friends 870 trap(fell in love with it) and saved for one and with it i shot my first 25-25. i have two 870,s in trap grade a TB and TC with a morgen pads(most of my clay guns have morgen pads). i shoot twiced a week and have made many fine friends over the last 50yrs at these shoots, there have been a few poop heads too,but for every poop head there have been over 100 super people. eastbank.