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my p64 has a round hammer made in 72

i replaced the stock hammer spring with 18 # wolff hammer spring for the second time (received replacement spring from wolff) but it did not make any difference in trigger pull, does
someone has experienced the same or explanation of the matter? 

thanks in advance

What are you hoping to change? Trigger pull?

trying snd hoping to improve and reduce da trigger pull.

I'm not sure what you're looking for. The spring originally in the gun measures around 25-30 pounds pull weight! It is extremely difficult to pull and that's why the Wolff replacements are there.

I started out with the 17# spring and had no problems. Light strikes were an issue, I was told, and sure enough one (a '62) started having light strikes. To not risk it happening in the other pistols (which didn't have any issues) i just went up to the 18# spring in all of my P64s. The pull is a bit stiffer than my Glocks 18# vs 5# so yes, the P64 will never have an extremely light DA pull.

But when you consider that it goes to around 3.5# in SA, I don't know that you'd WANT anything much lighter to start. Yes, the pulls seem waaaaay out of proportion, IMO, but that's the way it goes.

So, are you saying your DA trigger pull is very hard or just harder than you'd like? Or are both DA and SA weights heavy? If that's the case, I'd take it down and look at how the parts (trigger, trigger bar and other interfaces in the trigger parts fit and are lubricated. If something is skewed crooked just a bit, rubbing the grip or frame or not making proper contact you might see something. Use a flashlight....

thanks ketchman and robhic for your insights

SA pull is very nice but DA is almost impossible to pull in spite of the 18# hammer spring by wolff replacement . All I wanted is for me (to be able to physically) pull the trigger in DA, I don't think I have extream weak fingers.

zoics wrote:thanks ketchman and robhic for your insights

SA pull is very nice but DA is almost impossible to pull in spite of the 18# hammer spring by wolff replacement . All I wanted is for me (to be able to physically) pull the trigger in DA, I don't think I have extream weak fingers.

These were originally designed to be use with Mil-Spec sub-machine gun ammo that had very heavy/hard primes to prevent strike fire run aways. So the hammer was made with the force and leverage to hit the primer extra hard. Due to this we are left with few options in lightening up the trigger pull.

If the trigger pull is an issue for you then get some snap caps to protect your firing pin, and practice your DA pull. You will get better/stronger at it while breaking in the spring. If it's still an issue then maybe the DA is not the best option for you with this pistol.

If you decide to go with SA only, again use snap caps and practice that as well.

zoics wrote:thanks ketchman and robhic for your insights

SA pull is very nice but DA is almost impossible to pull in spite of the 18# hammer spring by wolff replacement . All I wanted is for me (to be able to physically) pull the trigger in DA, I don't think I have extream weak fingers.

I'd revisit the "something rubbing" or crooked/out of whack. Take off the slide hold-back lever (watch that little spring!) and take a light to look inside at the trigger inside. It might be binding or the spring might be screwed up. Something rubbing/out of alignment because with a Wolff replacement (I've tried the 17, 18, 19) and while not "easy" to pull, they're 75% better than the original. Not to embarass you but I bought one each for my 2 grandsons and while he's recoil sensitive, the 13 year old has no problem pulling the 18# trigger.

So look closely for a bind and lube things well.

I would agree with robhic and make sure that something is not binding. Yes the DA pull on these is stiff but not impossible, especially with the 18# spring in. Did you try the DA pull with the stock spring in and then compare to the 18#? If your pull is as hard as your telling us then I think there is an issue other than simple spring rates going on here. And if there is a bind then there is something not working correctly and just lubing it, while it may make the pull easier may not be all that is needed to solve the problem.

I practice DA pull, followed by the SA. You have to be careful that the follow up shot is conyrolled, because it is so lite!

I replaced mine with the 18 lb Wolff as well and didn't feel much difference with it compared to the original spring with a DA trigger pull. The switch did make the SA very light.

drummer wrote:I replaced mine with the 18 lb Wolff as well and didn't feel much difference with it compared to the original spring with a DA trigger pull. The switch did make the SA very light.

The gun comes with an approximately 30# trigger pull! It won't register on most "normal" trigger pull gauges. I'm not sure what was used but it's above 28-30 lbs. stock. Granted, the Wolff 18# spring is still a good pull (as is the 17#), but NOwhere near the original. There has GOT to be a bind, misalignment or something mechanical causing your woes. Lack of lube (sparingly!) in the right places could help but there should be NO confusion between the original and a Wolff replacement. Are you sure it is the 18# and not the 19 or 20# spring you used? Because I'm about outta ideas without seeing it.

robhic wrote:

drummer wrote:I replaced mine with the 18 lb Wolff as well and didn't feel much difference with it compared to the original spring with a DA trigger pull. The switch did make the SA very light.

The gun comes with an approximately 30# trigger pull! It won't register on most "normal" trigger pull gauges. I'm not sure what was used but it's above 28-30 lbs. stock. Granted, the Wolff 18# spring is still a good pull (as is the 17#), but NOwhere near the original. There has GOT to be a bind, misalignment or something mechanical causing your woes. Lack of lube (sparingly!) in the right places could help but there should be NO confusion between the original and a Wolff replacement. Are you sure it is the 18# and not the 19 or 20# spring you used? Because I'm about outta ideas without seeing it.

These are not always in stock condition when people get them. They are surplus guns! These people could have gotten them with a 19 or 18 pound spring already installed. Then switch the spring and of course you won't feel a difference.

contacted wolff about my spring and they have sent me another #18 hammer spring but has no effect on the da trigger. i will check for any misaligned or out of wack parts this weekend. thank you all for your replies.

Are you sure your replacing the correct spring? The hammer spring has EVERYTHING to do with the DA pull weight. It is THE spring that is being compressed in DA mode.

zoics wrote:contacted wolff about my spring and they have sent me another #18 hammer spring but has no effect on the da trigger. i will check for any misaligned or out of wack parts this weekend. thank you all for your replies.

Maybe look over these documents, and make sure you have ALL the required parts in the correct place.
viewtopic.php?f=7&t=1536

I don't think you ever stated where you got this P-64 from. Is returning it for an exchange or refund an option??

Also as I stated above; these are surplus guns, you don't know what if any mods may have been done by the previous user/owner. If it had already had an 18 lb hammer spring, then of course you won't feel a difference.

If all is well mechanically with this P-64 then maybe you just need to break in the spring using snap caps.