+1.   This is what my son did.  He has now started shooting the turkey load on the range to double check his gun.   Which last weekend took all of 1 shot.  #7 Hevishot 3" 20 gauge shell from 40 yards - 120 pellets in 10" circle centered on the killzone of the turkey.   He looked at me and said "I'm done" with a huge grin on his face!  Little suckers 20 gauge will almost outperform my 12.