Boyd Brothers makes a nice thumbhole laminated stock for 870's and Mossberg pumps.I have one on 870 with a rifled hastings barrel and Nikon scope,I would not hesitate to shoot 200 yards using a sabot slug. You could go with an Ithaca 37 or BPS since they are bottom eject,you can shoot with either hand. Marlin,Savage, Browning and TarHunt all make bolt action slug guns.The Marlin and Savage are pretty cheaply made,ugly wood,bad fit and the Browning or TarHunt will set you back a grand or more.