My favorites on here is when someone buys a new gun and before they ever lay their hands on it, want to know who can open up the chokes because the readings given were not what they wanted.
All of the "smart" replies were to pattern the gun with the shell you are going to use. The other replies were in my opinion the "dumb" ones that gave a persons name to do the work.
Right now my favorite sporting clays gun is a 1907 L.C. Smith hammer gun. When I bought the barrels they were from a Grade 1 hammerless and were 30" long. I asked the seller what the chokes were and he stated he did not have a way to measure them (yeah sure). I bought the barrels anyway and found out from our records ledgers that the gun was shipped with 32" barrels. There is still .014 constriction 1/2" from the muzzle in both barrels.
These barrels shoot very well and I have shot some incomers at approximately 45+ yards, and are also good at 20 yards.
As Stan stated also, gun fit is most important. I've read that most of the best shooters prefer full choke guns.
