I don't remember manufacturers requiring "break in" until recent years. The first pistol I bought that had a recommended break-in procedure in the manual was my Kahr CM9. (It was faultless from round #1.) This year, I've purchased two semi-automatic shotguns that had break-in procudures outlined in the manual. I'm starting to think it is to make up for a lack of fine finishing in the manufacturing process, or something like that. But anyway, for a carry pistol, I think the old advice to run 200 rounds of the ammo you intend to carry in it before carrying it is sound.