Originally Posted by BountyHunter
Not a real good idea with those chokes at all.
You are trying to force large shot down a .730 bore out of a .690 tube, what do you think happens?
Will distort the heck out of the shot and recoil will be awesome.
Try a modified first and then full.
Years ago, working guns over for pass shooting geese we found that more open (modified etc) routinely gave much tighter and more uniform patterns with large shot to include #4 buck.
Also two other things you can do to help patterns. have your gunsmith put a long forcing cone in which again serves to give better patterns by less distortion on the shot and cuts recoil by as much as 25%.
Backbored barrels help do some of the same things.
As BH said
less is better in this case .
Put a 4' x 4' peice of cardbord up at 60yrds and patern each choke starting with the cylinder
Some of the newer shotguns are over bored and have no forceing cone for better patterns
and a cyl or a mod choke works best with these on larger shot.
Also try different buckshot sizes to find out what your shotgun likes the best.
J E CUSTOM