SP5K Rules the Day
Broke mine in on 500 German MEN 124gr FMJs.
Followed by 500 Winchester 124gr NATO FMJs.
Then 200 Federal HST standard pressure 147 gr JHPs as a function check (
my SD round).
It's a laser with anything 147 gr.
So I run quality brass cased 147 FMJs for practice.
IMHO the SP5K isn't really a handgun,
but a semi-auto SMG.
Most start out with full power 124/147 gr ammo.
After X rounds you may be able to run
powder puff 115 gr
range fodder.
I run full power heavier stuff and have ZERO issues.
And It's good to practice with the same weight / pressure ammo you'll use for real :biggrin: