reloaded and used again, a convenient and valuable characteristic. Regardless of the type of gun employed, tournament skeet shooters have a problem. American skeet tournaments consist of at least four events: the 12 ga., the 20 ga., the 28 ga., and the .410 bore. These are four different sized shotgun shells (diminishing in size, in the order listed), requiring four different sets of chambers. Historically, that required four different guns, each weighing, balancing and presenting, differently, undermining a shooter's consistency. There is relatively little manufacturer interest in a cure for the problem with pumps and automatics. However, double guns present opportunities. One solution is to build four matched weight sets of barrels to fit one action (a "four barrel set"). This is expensive, from the 1970s to 1990s, four barrel sets reigned supreme in American skeet, and they remain thoroughly competitive. Beyond the expense, the principal criticism is that the four barrel set can still present a different sight picture for each gauge, because each barrel set, in diminishing gauge, is narrower than the prior set. The answer was to build barrel inserts for 12 ga. two barrel guns: these allow the shooter to switch out matching sets of full length light weight aluminum tubes (10-12 oz. per set) chambered for 20, 28, and .410, in almost any 12 ga. double gun. One could then use one gun to shoot the 20, 28, and .410 events with the same weight, balance and sight picture for each of these gauges. However, with tubes removed to shoot 12 ga. rounds, the gun will be 10-12 oz. lighter, and thus will swing faster and kick harder, undermining some of the consistency intrinsic to the concept. The solutions are: to stop shooting 12 ga. rounds at all in tournaments, thus always shooting through the inserts; buying a second, pre-weighted 12 ga. barrel (the latter makes the combination a "two barrel tube set"); or, three, adding removable weights to the 12 ga. barrels when shooting without the sub-gauge tubes, to try to match the weight and balance of the gun when tubed. All three solutions are employed, depending upon shooter preferences and/or resources, and tubed over and under shoguns now dominate American skeet tournaments. So effective is the tubed gun solution that perfect scores are often required to win the open title in individual events, and combined scores of 395 to 400 may be required