The extra fps is possibly useful - and if a gun will safely handle it then fine - I keep +P GD's in my 226. It even adds a smidgeon of potential increased functional reliability too IMO - hardly essential tho. Maybe only 50 fps extra.
It is tho many feel hardly vital to go +P - as benefits are probably quite limited. Penetration is an issue I am less and less concerned about over time - if time allows us to even think about rule #4 then good - but if the BG has a ''thru and thru'' - that's fine by me!
I honestly think we have become ''penetration sensitive'' to excess - we need a round that gets the job done - that is where choice matters IMO - which means a round of modern manufacture, proven reliability (in your carry piece) and a bullet design that works OK.
This is effectively most SD ammo out there!