any stronger recoil springs then #40?
 

Hey guys. I have the wolf extra power 40 pound recoil spring the extra power striker spring in my luger. I just got back from the gunsmith gun is superbly clean. Action functions like butter. Problem being is even with extra power Springs it still fails the tape test with regular Remington umc 115 and American eagle 115. These loads averaged 1050 or so over chrono. Why is it battering the toggle back? Feeding and function is flawless so I think a heavier spring will be fine.

The knee-action toggle assembly of the Luger 'slaps' the rear wall of the grip frame on opposing sides; the breech-block strikes from inside and the rear toggle 'ducktail' from outside. Increasing the charge just makes the 'slap' harder.

I agree with Seager that for best results with these old technology pistols you should work up a load that just allows the action to cycle reliably. A heavier mainspring requires extra powder charge just to cycle the action. It also gives the 'slap' the effect of hammering the steel.

If you want higher velocities, use a lighter bullet.

...My $.02, and worth every penny you paid for it... :D

40 #'s?

Isn't that about 18lbs more than normal?

Agree sheepherder. Just that appears to have went from missing the bluing by ducktail to slight indentations. :-/ I shall start looking at reloads. Was not aware the stronger recoil spring caused a harder slap.

Ed, factory is #38

Hi,

It may be that they are loaded with too fast burning a powder.


Sieger

Hi,

A proper load does not cause slap at all, as slap occurs as the very last resort.

True, hotter loads either cause or increase slap proportionally.

Uncontrolled slap will, eventually, cause breach block failure and put your Luger out of service, permanently!!!


Sieger