I’ve gone round and round and shot them with everything from 2 3/4 20g and 16g all the way up to 3 1/2 12 and even one with a 10 gauge. By far my favorite is 2 3/4” 12 gauge and I’m setting my kids up with a soft shooting Remington 1100 with just that shell this year. No fancy turkey loads, #6 heavy field. These days I mostly hunt with whichever shotgun I find in my safe that needs to go for a walk with me!