[ithacaartist]

Originally Posted by cda_berbaro

hi, why i should have problems with ammo over 1100 fps?. can you explain?
thanks

Giuseppe,

Too high a muzzle velocity = too much energy to cycle the pistol. The extra power goes into stressing the action of the gun as the rear toggle link slaps the rear of the frame and the breech block is slammed back against the inside of the link by the energy in excess of that needed to cycle. The advantage of hand loading is that the round can be tuned to a range of power that will dependably cycle the action without bottoming out its parts, one against another. That's why +P or +P+ or ammo marked NATO is not recommended. Standard power loads like Winchester White Box usually fall within the mechanically acceptable range.