doc,
I went long and full this year too! It ain't H&R, but it is 30" full choke. Try out some of the Winchester HV turkey loads. This is the first time I tried them and that old Model 12 will put 148 in a 10" circle at 35 yards with them --- and that is with a 2 3/4" shell!
Oh and I also have a 28" full or it may be 30" that my stepdad gave me with a case hardened frame and it is awesome for them 100' trees in the swamp chasing squirrels.
Daman