Had a 25 cal hydra. Over 1000 rounds no problems. Great rifle, super accurate and quiet. The quick change system is cool, but it must be tuned between calibers and there isn't a easy way to do that so it's basically a moot point. If they set up a dial on the back for the hammer or a transfer port adjuster that you could choose between 177/22/25, then they'd have a winner. Guess they didn't think it through.
I just figured .22 and arrow launcher would do me .. then i got to wonder the guys who got extra barrels just to find they dont fit if that been straighten out . Also need normal barrels and iron sights not just QE only ..