Designed for standard velocity but will handle high velocity if you don't make a habit of it. Big thing is the tight chamber will foul quicker with lubed lead bullets so I stay with brass plated ammo. I do not buy bulk Golden Bullet but the boxes of 100 and it seems to work fine. I have a lot of varieties but this is my main ammo for this gun.
I can shoot a lot of this before I have to clean the gun but 50 rounds of lead ammo means a stop to shooting till I get a bore brush in it and get the chamber clean again.
"When once a republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil."~~- Thomas Jefferson
Roman Catholic, Life Member of American Legion, VFW, Wisconsin Libertarian party, Wi-FORCE, WGO, NRA, JPFO, GOA, SAFand CCRKBA