I've owned two Sauer 3000 12ga/30-06 drillings of about the same vintage, and both shot 180gr Remington PSP like they were regulated with the ammo. I hope this helps.

This one is one of the two, and I don't load for it...just buy Rem 180gr ammo.

W/O scope

The bottom gun is the Sauer 12/30-06 W/Scope