Best choice of Wolff replacement springs for an P-64?

[jski]

Just ordered a Polish P-64 and intend to order a complete set of Wolff replacement springs. Of those listed below, which would make the best choice?

Hammer Spring Ratings: Reduced Power...: 17, 18, 19 & 20 Lb.

RECOIL SPRINGS are available with load-rated specifications. Each load-rated recoil spring package includes an extra power firing pin spring.

• Reduced Power...: None Available
• Factory Standard.: 18 Lb.
• Extra Power.........: 20 & 22 Lb.

 

[jaguarxk120]

The one write up I've seen say's a 22 lb recoil spring will help.
A lighter hammer spring should improve trigger pull.

 

[jski]

What are the consequences of going with a heavier recoil spring?

 

[amd6547]

I replaced the springs on my P64. I believe I went with the 20lb recoil, and the 18lb hammer. The heavier recoil spring made a positive difference in felt recoil.
As for the hammer spring, prior to changing it, the DA trigger was almost unusable. After the spring change, it’s still pretty firm, but now I can pull it easily.
The little beast has a good kick, is very thin and smooth, making it great little carry gun. Plus, I like that when I was getting my high school diploma, some polish Warsaw Pact era officer was carrying it. Never would have dreamed back then that such a gun would be mine.

 

[jski]

I replaced the springs on my P64. I believe I went with the 20lb recoil, and the 18lb hammer. The heavier recoil spring made a positive difference in felt recoil.
As for the hammer spring, prior to changing it, the DA trigger was almost unusable. After the spring change, it’s still pretty firm, but now I can pull it easily.
The little beast has a good kick, is very thin and smooth, making it great little carry gun. Plus, I like that when I was getting my high school diploma, some polish Warsaw Pact era officer was carrying it. Never would have dreamed back then that such a gun would be mine.

Did you try or consider the 17# hammer spring? Were you concerned it would adversely affect the SA trigger pull?

Each load-rated recoil spring package includes an extra power firing pin spring.

I assume you replaced the firing pin spring with the accompanying firing pin spring?

 

[Coyote3855]

The lighter the hammer spring, the lighter the DA trigger pull weight. The danger of going too light, i.e., the 17# spring, is that it may not be strong enough to set off the hard primers often found on imported 9x18 ammunition. I have the 17# spring in my 64, and have not experienced a failure to ignite. It's a range gun, so I'm not concerned about going too light. The 18# is a good compromise but should be tested with your choice of carry ammo if you plan a defensive use of the pistol.

 

[jski]

I'm intending to use Hornady's Critical Defense ammo with the nickel plated brass which helps autoloaders cycle.

 

[jski]

Since the P-64 uses a blowback design, it is the force of the fired case that drives the action. Consequently, the recoil from the fired case drives back both the recoil and hammer springs. If I reduce the hammer spring weight, I then need to increase the recoil spring weight, correct?

So I comes down to what is the best combination of recoil and hammer spring weights?