There is no such thing as a .40 S&W +P, it's a marketing ploy. Georgia Arms does the same thing, they offer a .40 +P. If, in fact, it is loaded over pressure, then I would be very very wary of using it. The .40 can easily achieve 1300+ fps with a 155gr out of a 4" barrel without going over pressure, so why it's pushed as ".40 +P" is unknown.
"There is a principle which is a bar against all information, which is a proof against all argument, and which cannot fail to keep a man in everlasting ignorance – that principle is condemnation before investigation."