QUOTE]..... the P99 is not designed for hot loads...[/QUOTE]
While this is true the P99 can surely handle +p loads. This is what I use for a personal defense round. And while I do shoot these they are not my plinking ammo. I reload my own so that will not help you. But when I buy, I buy cheap, in bulk and what is locally available. I use Remington UMC or Winchester White Box. 115 grain FMJ. Since I reload I keep the brass. Yet my early model 99 likes 124 grain better and if I am feeling lazy I buy Wolf or Brown Bear. I know people have talked about the steel cases may damage the pistol but I don't shoot them enough to really make a difference. Honestly the guys I've talked to who frown on steel brass are owners of indoor ranges who collect spent brass for resale. Since most the steel is Berdan primed, except for maybe CCI, they cann't reuse it and it is just a hassle for them to cull the stuff out from the rest. I think it is a conspiracy theory.
The lacquer on some of the Russian stuff has been said to cause fowling in some pieces like AR's. Also extractors and feed ramps may be damaged by the steel case. If someone has more or different info, please let me know.
I like Speer Gold Dot, 115 or 124 gr JHP for carry. My 2 cents.