Anyone tried heavier recoil spring in xdm 10mm?

[Azrckcrawler]

Factory spring

Coil dia .512
Wire Dia .051
OAL 5.875

Wolff 18lb spring

Coil dia .512
Wire Dia .053
OAL 5.915

Wolff 20lb spring

Coil dia .512
Wire Dia .053
OAL 6.09 (Been compressed for a few weeks)


Wolff 22lb spring

Coil dia .512
Wire Dia .055
OAL 5.827


No part numbers on the individual spring bags, they all came in Wolff Recoil Calibration Pak #13226.  Spring top/bottom are not ground (flat), full dia at top and bottom.

[sqlbullet]

Any chance you could add the coil counts?  With those four values and a guess at the kind of wire the theoretical spring constant can be calculated.

[BEEMER!]

Any chance you could add the coil counts?  With those four values and a guess at the kind of wire the theoretical spring constant can be calculated.

I was just going to add that coil count is critical not length.

[50BMG]

Crap.
I forgot spring diam. tooo...

I'll get that and coil count on my stock spring later when I get home..

[50BMG]

Recap: The spring OAL is 6.085" on my 6" caliper (measured roughly 6-1/16" on a steel tape; only @1/4" shorter than a 5" 1911 spring I had laying around).
The wire diameter is .051" (could it be .0515" or .052"; some coils seem to measure a little fatter than others).
.507" OD
.402" ID
26 COILS
Both ends are closed, squared and ground flat.

[jtracy1223]

Ordered a 22 lb spring on monday. With any luck i will have it by this weekend and be able to try it out.

[sqlbullet]

Recap: The spring OAL is 6.085" on my 6" caliper (measured roughly 6-1/16" on a steel tape; only @1/4" shorter than a 5" 1911 spring I had laying around).
The wire diameter is .051" (could it be .0515" or .052"; some coils seem to measure a little fatter than others).
.507" OD
.402" ID
26 COILS
Both ends are closed, squared and ground flat.

That should be about an 18 lb spring.

[am44mag]

Ordered a 22 lb spring on monday. With any luck i will have it by this weekend and be able to try it out.

Bought one of those and got it today. I've got some light loads and some heavy loads to try it out with. If it runs the light stuff and doesn't throw brass from the heavy stuff into the next county, I'll be happy.

Sent from my SM-G965U using Tapatalk

[am44mag]

I tried out the new 22 lb Wolf spring, and it works pretty well. My gun is the 4.5" version of the XDM.

175gr lead at 966 FPS - most cases landed in a pile 2-3 feet away. I only fired 15 rounds, but they all cycled. I can't guarantee that light ammo like this will be 100% reliable, but I saw no signs of the gun struggling to run it.

175gr lead at 1070 FPS - the cases landed around 9 feet away, and were scattered around.

175gr lead at 1185 FPS - the cases landed around 14 feet away.

Sent from my SM-G965U using Tapatalk

[jtracy1223]

Is anyone using the wolff firing pin spring that comes with the recoil spring or just sticking with the factory fps?

[am44mag]

Is anyone using the wolff firing pin spring that comes with the recoil spring or just sticking with the factory fps?

I used the Wolff spring. I don't know if there's a difference though. It seems to work just fine.

Sent from my SM-G965U using Tapatalk

[50BMG]

Recap: The spring OAL is 6.085" on my 6" caliper (measured roughly 6-1/16" on a steel tape; only @1/4" shorter than a 5" 1911 spring I had laying around).
The wire diameter is .051" (could it be .0515" or .052"; some coils seem to measure a little fatter than others).
.507" OD
.402" ID
26 COILS
Both ends are closed, squared and ground flat.

That should be about an 18 lb spring.

I modified my 1911 spring gauge for the wider diameter XD spring, and you are right, it's 18#.
It must have been binding/dragging  more than I thought...
I think I'll try a 20#.

[jtracy1223]

Been a while but after much snow and cold my local range is now melted off and accessible. I had a chance today to shoot the xdm10 with 22 lb spring. I was very happy with the results. First i tried a minimum load of universal under a 180 grain hornady hap bullet. I wanted to make sure rhe gun would reliably cycle the wimpiest powder puff load i could think i would ever use. It did. No issues. Next i loaded up full house loads of longshot under the same 180 grain Hornady hap bullet. The cases landed about 10-15 feet away in a relatively small area. Thats about 10 foot less than with the factory spring. Recoil was not reduced noticeably but the recoil impulse seemed less sharp if that makes sense. All in all im happy and feel it was money well spent.

[50BMG]

Hate to stir up an old ghost here, but something is screwy with my new Wolff spring.

it's supposed to be a 22#, their spring #54222.
When I first put it in, I was surprised how short it was compared to the stock.
when I got the gun back together, the force required to start the slide moving actually seemed less that the stock, but the thicker wire seemed to make up for that the more the slide moved rearward.
I fired a few 180 & 185 grainers through the gun and something just doesn't seem right (I used a backstop to catch the brass so I can'tcompare how far the brass would have flown vs. the stock spring).

I took it apart this evening (only been in the gun for 2 days and @30 rounds fired) and the new spring already has a little bend in it.
Compressing it to the same length as the factory spring on my gauge (@1.655") shows only about 17# on the scale.

Here's the specs:
5.230" long (almost 3/4" shorter than stock)
.515" O.D.
.053" wire diameter
27 coils

Doesn't seem like this is the right spring...?
Kinda bummed, I have a few hotter loads I need to test and the extra power sure would make me and my XDMs frame feel better.

[50BMG]

John Andrews from Wolff Gunsprings emailed me back.
He said these are the dimensions of their 22# XDM spring (I assume when brand new):

Wire - .054"
End OD - .515"
Body OD / ID -  .513" / .405"
Length – 6.5 inches long with 27.5 coils

They are sending me a new one.