I have a 12x12/9.3x74r Merkel from 1969 made in Suhl. The chokes are Imp Full and Imp Mod. and the barrel diameter is 18.3. After discussions with my smith, I feel IF and IM are too tight for slugs and OO buck.

I am looking to use this gun mainly for feral hogs and having the shot gun barrels loaded with OO buck or slugs would make a big difference.

So should I open the chokes?

thanks

Doug