Even if you only get 6,000 rounds out of your airsoft gun before it takes a complete dump, you are still way ahead money wise and also in terms of repetitions on technique than using live-fire....even if compared to shooting .22 ammo. Not to mention time and fuel cost traveling to and from a live-fire range. I've got a whole cupboard full of broken airsoft guns, I consider them a badge of honor, plus I've got at this time 460,000 rounds of airsoft bb's downrange and counting since about 2002. No possible way I could have ever gotten that much practice with live-fire without winning the lottery.