As I posted earlier, my son gets to hunt Tejon Ranch on a youth hunt. We have a Carlson Turkey choke tube for his 870 20 ga that is for use with Bismuth, Tungston, etc. Will the turkey choke be okay - I have read (I think) somewhere that some of the non-lead shot works better with less constriction? I don't think I have a regular full choke - just imp cylinder and modified. The non-lead shot I have for him is all #4 shot. Should I try to find some smaller #5 or #6 shot? ANyopner know who might have some in the southern/western part of LA County or the northern end of Orange County?