What is normal spring weight for 10mm

[John A.]

I’m curious what normal spring weights are for 10mm.

Especially for hot 10mm.

I’m assuming at least 20 – 22 lbs ???

But, I’ve assumed and have been wrong before too.

So for any of the 10mm guru’s here, I’m asking if you could please point me in the right direction.

I’m not asking for a weapon specific answer either. Just in general. I know what’s available for 1911’s and glocks and XD’s and tangfolio’s and such, may have all have different answers. But if you were designing a gun today, based on your knowledge, what would you do with it if you were making it from the ground up for a steady diet of spicy loads?

Thanks in advance.

[The_Shadow]

I run all of mine with the Wolff Gunsprings:
22 lbs spring in my S&W 1006. I have the 18 lbs, 20 lbs and 24 lbs for testing.
22 lbs spring in the G-20 non captive recoil rods. I have 20 lbs and 24 lbs for testing.
And the G29 I run a dual 21 lbs recoil rod setup. I have the dual 23 lbs for testing.

This is their web site
https://www.gunsprings.com/

[John A.]

Didn’t know a guy could get a 24 lb spring.

I’ll look that up.

In the process of trying to design a better AR buffer for the carbine.

Thanks !!!

Edit:

Any way you could give me the inside and outside diameter and length of the spring? If it isn’t too much trouble?

• This reply was modified 8 months, 3 weeks ago by John A..

[sqlbullet]

You really can’t answer a question like this out of a specific gun context. Lockup type, slide weight, fire control type, etc all play into this.

The answer for a straight blow-back striker fired 10mm is very different than a rotary lock hammer fired which is different than a hinge lock striker fired. (One of those doesn’t exist that I know if, but there is no reason it couldn’t.)

I own 1911s, Witnesses and Glocks in 10mm. I don’t meddle with factory springs unless I have having a function or early unlock issue, with one exception; Five inch 1911s immediately get a flat bottom firing pin stop and an 18.5 lb recoil spring. Before I upgrade the recoil spring I will add 2 lbs to the main (hammer) spring. A 1911 trigger is good enough that the extra pull weight doesn’t bother me.

I know Wade runs heavier springs in his Glocks especially as he runs very hot loads and has had some issues with early unlock. His specs are above.

In the past I have run springs in the Witnesses and 1911s as heavy as 24 lbs.

[John A.]

I don’t disagree with what you wrote.

In this instance, it’s in an AR. It currently has a 308 caliber flat coil spring and 12 ounce buffer and I’m not sure what the bolt weight is, but it’s heavy.

And still slinging brass out about 12 feet away.

So, it certainly does need more resistance than what it currently has.

When using a non-scientific fish scale to see how many pounds the pull is on the charging handle, it’s around 18 or 19 pounds when fully rearward.

Which is still not enough.

So, that’s the reason why I’m in the process of making a 2 stage buffer for it, with heavier springs. Similar to the Armaspec stealth. But not quite.

In a different upper, I heavily modified an armaspec buffer to work in it. Only in this case, I am using an A2 rifle length to further slow the ejection down with the longer action.

I had to make a different/longer buffer on my lathe due to how the guide rod and bolt works, but I’m just trying to find the heaviest springs I can find. If it’s too heavy, I can always reduce the spring weight some. Or skeletonize the buffer weight to reduce some of the mass of it.

That’s why I asked about the spring sizes earlier so I could tell whether I wanted to try to use that style spring. Since I’ll be making the guide rod and buffer setup myself, I can make it any size that I want. I just needed some numbers to get an idea as to whether I wanted to use that kind of spring based on the diameter and length of it.

[Alaska338]

For Glock 20 the OEM spring weight is 18lbs.
I upgraded my recoil rod and spring to Pure Tungsten and 22 pound spring for my 700 FPE heavy trail loads.

[Author]

Posts