I have a .38 cal. Colt Cobra 2" air weight revolver that I bought for self defense use in the house and throw in the glove box if I want. I have some Federal Flat Nosed +P ammo that I used to use in my steel framed 2" SW Mod 10 snubby. I recall that a steady diet of the +P ammo in an air weight is verboten but will shooting 6 rounds, if necessary, ruin the revolver? Would there be a better commercially available ammo for this Colt and this purpose? My Mod 10 is too nice to use for this purpose and I have several other semi autos that I could use but want to keep it simple for the wife. Thank you.