It doesn't give any specifications on the ammo. I wonder how it gets "tuned" for an STI pistol?

https://www.midwayusa.com/product/729904/sti-ammunition-10mm-auto-major-180-grain-full-metal-jacket-box-of-50

It says it's optimized for reliable feeding in the sri guns and the loaded for the "longer cut sti chamber" , also says certified with in .1 grain powder charge