I personally have shot 35,000 rounds of +P loads through my model 10 in one summer. This gun was well used when I got it, and this load, a 148gr. at 1000+ fps. never did a thing to this gun with good maintainance. This gun still shoots great and got revived for falling plates competition for about 3 months recently. If you don't need +P, don't shoot them, if you do, YOU will probably wear out before a K frame S&W will in 38 spec.