Recoil Springs

[REDLINE]

Any thoughts on one or the other being better for Glock 10mm pistols between the "round wire" springs by Wolff or the "flat wire" springs by ISMI?

Other thoughts in general between the two?

[Vice]

Good question!  I'd like to know if there are any advantages of one over the other.

[DM1906]

Round are smoother, flat last longer.  I quit replacing round springs, and have yet to wear out a flat.

[REDLINE]

Who woulda thunk it could be just that simple.

Thanks for the info.

[Noatak]

Great info as usual DM1906!  So since I plan on a steady diet of hot Underwood 135gr, 165gr, and 200gr 10mm loads for my G20, how many rounds should I expect to get from a flat spring in the 22lb weight?  I was going to order some springs and I don't want to order too many.  I was thinking 2 or 3 max, is 22lbs about right or should I opt for 24lbs?

[Turo]

Great info as usual DM1906!  So since I plan on a steady diet of hot Underwood 135gr, 165gr, and 200gr 10mm loads for my G20, how many rounds should I expect to get from a flat spring in the 22lb weight?  I was going to order some springs and I don't want to order too many.  I was thinking 2 or 3 max, is 22lbs about right or should I opt for 24lbs?

The springs are cheap, and I've never worn out a recoil spring.  But I'm thinking if you can afford to wear out a recoil spring by buying factory 10mm, you're going to spend more than 10 times the cost of the gun on ammo, so order as many as you want.

I opted for the 24lb ISMI spring, and my gun even operates reliably with .40 out of a conversion barrel with 180gr going about 900fps.  I doubt there will be any issues with a heavier spring, and if you shoot hot ammo all the time, I say the heavier the better.

[Yondering]

The ISMI springs are good quality, but don't meet their advertised rate. I run the stiffest (24 lb), because it's really only a 18 or 19 lb spring, at best. I returned two of them to LW and bought a third from Glockstore, before calling the owner of ISMI and discovering that's just how they are.

Reports from the 10 ring on glocktalk indicate the Wolff springs are stiffer, but I have not measured those.

[sqlbullet]

I have not measured my wolff springs, but they are significantly stiffer than factory springs and leave me little doubt they would be in the ballpark of advertised rates.

[REDLINE]

The ISMI springs are good quality, but don't meet their advertised rate. I run the stiffest (24 lb), because it's really only a 18 or 19 lb spring, at best. I returned two of them to LW and bought a third from Glockstore, before calling the owner of ISMI and discovering that's just how they are.

Reports from the 10 ring on glocktalk indicate the Wolff springs are stiffer, but I have not measured those.

Well, now I've got full sets of all available weight springs from Wolff for both my G20 and G29 along with new guide rods.  Wish I could try them out sooner than later, but right now it's looking like later.

[REDLINE]

I have not measured my wolff springs, but they are significantly stiffer than factory springs and leave me little doubt they would be in the ballpark of advertised rates.

What's a proper way to measure spring weight?  I'ld be curious to see just how they measure up to what they're advertised at if possible.

[sqlbullet]

It is beyond easy accomplishment with the tools I have at home, which is why I haven't tested.   

[Yondering]

I have not measured my wolff springs, but they are significantly stiffer than factory springs and leave me little doubt they would be in the ballpark of advertised rates.

What's a proper way to measure spring weight?  I'ld be curious to see just how they measure up to what they're advertised at if possible.

If you're creative, and have some calibrated weights in the 10-25 lb range, you could do it at home, but it would be a pain. I have access to a load/displacement data collection system that works really well for spring testing.

[DM1906]

Use a fish scale.  You can "calibrate" it while at the hardware store, using their nail scale (which are usually very accurate, and some are DWM inspected/certified--look for a sticker on it).  Use plumber's tape to make an adapter, or get more fancy.  It's a simple operation, don't make it into rocket science.

[REDLINE]

...don't make it into rocket science.

Good Point!