You might also just try filling the stock bolt hole with #6 (or so) lead shot, adding some packing peanuts or foam rubber forced on top to keep them from moving around AND ( this is the BIGGIE!!!) going to standard 2 3/4" shotgun slugs, not 2 3/4" Mags, not 3" mags, and not 3.5" Mags!!! go with a lighter slug and a standard 2 3/4" 12 gauge shell and your deer will be just as dead, and perhaps deader (if that possible) and quicker too because you won't develop a FLINCH from those Grizzly Bear sized loads and because of that you will be able to put your shot right where you are supposed to. Believe me buddy, those regular 12 gauge slugs work great and only kill on one end!!! Of course I am an opponent of "Magnumitis" and "Rapid fire" when hunting anyway, remember, one well placed shot is all it takes, isn't that why we shoot these fine little guns for anyway? And shouldn't it be fun for use too, not painful and torturous....<><.... :grin: