New 30 luger built up

[kurusu]

Originally Posted by sheepherder

Tom, do you know the wire diameter??? Wolff's 36/38/40 pound rated springs are all .056" wire diameter and 19, 20, and 21 coils respectively. (I take these pound ratings with a grain of salt).

Since you have no takers so far, I went down to the safe house and dug out the M2.

Wire diameter .060" 14 coils. The pistol works flawlessly.
No way of knowing if the spring is original to the pistol.

I decided to compare with my BYF 41.

Wire diameter .059" 21 coils. Also works flawlessly.
Also don't know if that spring was ever changed.

[aldo35]

How would you measure the tension of a recoil spring?
Aldo35

[rhuff]

Originally Posted by kurusu

Since you have no takers so far, I went down to the safe house and dug out the M2.

Wire diameter .060" 14 coils. The pistol works flawlessly.
No way of knowing if the spring is original to the pistol.

I decided to compare with my BYF 41.

Wire diameter .059" 21 coils. Also works flawlessly.
Also don't know if that spring was ever changed.

I just checked 3 of my recoil springs and they measure .053-.054(WD). Two of them are known Wolff springs, one with 17 coils, and the other two with more coils.

[kurusu]

Originally Posted by rhuff

I just checked 3 of my recoil springs and they measure .053-.054(WD). Two of them are known Wolff springs, one with 17 coils, and the other two with more coils.

Also decided to check my 1915 DWM P08, and again .059" 21 coils.