What are you thinking!!!! I have barrels in 17HMR, 22lr, 22 Hornet, 357 Max, 41 Mag, 44 Mag, 45/410, 375 Win and 375 Win. A bunch of them calibers overlap. Are they fun to shoot, you bet, that is why I keep them all. Fun, and the fact that most of mine are 10" barrels which I like the best in the appropriate caliber and new ones are now a thing of the past. I have sold a few over the years, so I could not fault you for doing it, but the 7-30 is one of the best calibers to be had in a factory barrel. I think I would hold on to that one.