Very subjective question. If you shoot well, then a full choke will make NO difference. If you shoot so-so, then the full choke will cause some losses over an open choke on that first shot. There is no way to answer or quantify this by anyone else besides you.
man o man how did they do it before choke tubes?You don't need choke tubes to shoot a good score, if you think it makes a difference, it may. I don't think it makes a difference, so with me it don't! Just feel the security with the fact that if you are a little slower, the bird will never be out of range. mark crist
Not that I recommend it if you have a choice, but my good friend won the state doubles title shooting an 1100 with a Tom Seitz choke (.035). Many events have been won with an 1100 shooting only a full choke barrel.
Had the seller use barrel and choke gauges and measure the constriction.
Things look a little different now.
In the over/under, the bottom barrel mikes 20 points and the top barrel mikes 28. Upon a second look, the barrels are factory marked improved-modified and full.
The unsingle mikes 38.
According to a table on page 190 of "The Gun Digest Book of Trap & Skeet Shooting", 20 is nominal for modified and 30 is nominal for full. Extra-full is nominally 40. Am sure other tables and sources might vary.
Will have to make a purchase decision without seeing or shooting the gun.