You can buy a third party conversion barrel from Top Gun Supply and with 9mm mags you are fine. If you want to change the recoil spring, you can pickup a P229 9mm recoil spring at Top Gun as well. Many have done it and it works. As for added wear, any time you shoot a pistol it adds wear to it. You might see some added wear characteristics on the slide where it mates with the various barrels. Nothing to be concerned about, IMO.