The "target gun" is the least expensive component in the competition arena. I have 100,000 plus registered ATA targets, many of my fellow shooters claim around $1.00 per target as travel, ammo, day fees and all the supporting costs are added in. In 30 years of shooting I have maybe 5 different trap guns that were used specifically for competition.
If you are just making empty shells at the range it saves a lot of money.