my sons have 20ga. stoeger condor 26" barrell any choke recommendations? they have the carlson .575 turkey choke in them now and hevi 13 #7's did not look to good at 40yds. it was about 65degrees cloudy and no wind did not try closer. also will the beretta, benelli chokes fit or is it just the moss. , win. , invector chokes the only ones?