this same question was asked a few weeks ago.

since I'm a three barrel swapper, my answer is/was.

same trigger, stock, & scope being used on the same gun. also, getting a better barrel than the factory. it's not for every one, but for people like me , who like to tinker with stuff, it's a hobby, & fun.

I have never shot a factory round out of any of my rifles, & that's in over 50 yrs. so I can experiment with different things.

also some of what you said, " I can do it myself " thing?