Hey guys thanks for the information. I'm getting educated.
The heavyest load I have shot is 2 3/4" #4 birdshot 3.25 Dram. So I will stick with position 2. I have been looking over some posts and apparently a gunsmith can add a choke, or I can send the gun in and get a specialty one put on? I will probably not bother at least not right away.
I haven't really found an answer to the pistol grip question, maybe I just missed that post...
thanks