Well, since I get my ammo "direct from the factory", it's moot. Now, I use max loads in several guns, as long as they're strong enough to handle it (1911A1, Glock, Colt Revolver, Smith K-38).
The term +P basically means a max load with a light bullet (relatively). In other words, 45 ACP +P's should be about 185 grain, not 230 grain.
And, in those terms, I'm a believer in high velocity and bullets on the light side.