IME supervel is pretty terrible. I know I’ll probably get flamed for that but I’ve seen multiple people have issues with their ammo locally. Either it won’t gauge, has bullet setback, or people saying they have to modify their guns (HD extractor springs) to make it run reliably. There’s better options for better prices for remanufactured ammo. I use an 11.5 spring and so far haven’t had any issues with Federal, Winchester, CCI, or Fiocchi.