Choke tube caliper question
I have an 835 that I am unable to get the choke tube out without ruining the tube. Instead I have measured the inner diameter of the choke tube with a verniel caliper. I'm getting .071 which some research shows me is an extra full choke in the 835. If you call Mossberg and get their recommendations on shooting 3 1/2 lead 00buckshot through the extra full M835 choke they say no, however the modified choke measurement on a Mossberg 500 is .071. They say it's okay to shoot 00buckshot through a modified choke on a 500 with a measurement of .071, but not an 835 with the exact same choke size of .071. Both choke sizes muzzle end 0.71. Any insight folks?