TexasCHLforum.com

I think that it is probably safe to assume that most firearm manufacturers like to keep their butts covered legally when it comes to +P or +P+ ammo. Think about it this way, if they never really say where they stand on shooting ammo that is 22%+ higher pressures than the ANSI/SAAMI specifications then they are in the clear should anyone have a KB. But, if they go out and tell people yeah it's fine to shoot +P/+P+ ammo and something happens, they are in deep doo doo.

So, I'm thinking most of them don't like to advertise the use of higher pressure ammunition just in case it comes back to bite them. Atleast, it makes sense to me.

Even though some guns don't clearly state that they are +P rated it should be fine to run a couple mags through them. I've run plenty of +P rated ammo through guns that didn't state they were +P rated in the manuals. Most of the time when I called the manufacturer the answer I received was dependent upon the person I was speaking to. Some would so, "no not at all" and others would say "a couple hundred rounds in it's lifetime wouldn't hurt it but don't make a habit of shooting +P ammo".

Your mileage may vary, but from my experience and from the experience of many others, it's not enough to blow your handgun to bits on the first try.