RE: 3 1/2 vs. 3"
Im sorry to have to mention this, Chinchy but if a flock come in ' a little high' you should leave them no matter what gun/load you have. The idea of the 3 1/2" cartridge is not for extra range as it only really extends it about 5yds, but for extra killing power at close range!!! Any responsible hunnter should never shoot at a bird that he deems is a bit far no matter wot the cartridge!!
Tomy D