Messing with the chokes in a fine pigeon gun is akin to gelding a prize stallion. So many have been opened that is is hard to find ones that have not. Please don't open yours, future generations will thank you.

I have found that Fiocci "Power Spreaders" work best in my Purdey that normaly throws 95% patterns. I don't use the spreaders beyond 15-20 yards, however, as they do open up quite a bit, with some "holes".

All the best, Mal