which springs

[krafcheck]

Shot more than a few rounds this time. Palm is sore. 
I had a lot of failure to feeds and about 4 failure to fires.  I bought my 10 used and it has a longer barrel with a couple of ports on top.  Don't know the maker.  And a after market spring and rod (metal). Don't know the pound. I now assume it is stock poundage about 17. 

I have had failure to fires before. Should I get the 6 pound fire pin spring?
Also is the 22 pound recoil spring the go to for the stiff 10mm or should I go to 24?

I never have failure to feed with the lite and mid power (hornady).  If I go up in spring will I have trouble with regular rounds?

I really like 165 and 200 gr. Full power stuff may change when I go up in spring pound.  I even hit a target a few times at 100yards with the 135 under woods.  Family went out and shot up a good 200 dollars worth yesterday.

Thanks

[Intercooler]

What 10mm is it?

[The_Shadow]

krafcheck, just to be sure you are working with a Glock 20 (gen unknown? SF?) extended barrel with comp ports (unknown maker)?    Recoils system and spring rate unknown?   Have to wonder what else is modified? Trigger/striker/safety plunger parts?

If this is a Gen4 gun you may require other things than what is being advised...
Here is what I would do, get a stock Glock factory recoil spring setup.  Not expensive, test with that for proper function.

If all you have is the aftermarket barrel of unknown origin, the chamber may be tighter, thus this can hamper feeding if the cartridge are not being feed at the correct cartridge angle from the magazine and at a slide velocity indicative to proper feeding and alignment.  Feed ramp condition and chamber entrance may need polishing.

Light hits or no hit by the striker are evidence of out of battery, short chambered cartridges, poor striker spring or worn or broken striker.  Inspect the chamber to insure it is clean of any and all materials, no debris accumulated at the end of the chamber cut, then see if your cartridges fully chamber flush or slightly below the chamber hood.   Be sure the slide with this barrel is returning fully forward without the lock up holding back some, there were some barrels which didn't allow the slide full forward travel due to locking lug surface angles.

Some magazines can be out of speck as it relates to the angle at which the cartridge is held to be fed.  The lips can be worn, spread or crushed to cause issues.

[krafcheck]

Glock 20
This is one of the first made.  Gen2.  According to serial number February of 92 if I remember right.  Which is consistent with what he said.  Said he got it soon after g20's came out.  I'll ask tomorrow at workwhat all he did to it.  From what iI remember just barrel and aftermarket recoil spring. I have asked him if he knew what poundage and barrel but he couldn't remember. Everything feeds with weak ammo just not hot stuff.  About 4 or 5 ftf per 50-75 pull of trigger.

I do have the stock spring and barrel.

[Intercooler]

   Moved it here where the Glock experts will see it.

[The_Shadow]

Recoil system changes may help the situation, try an assortment of spring weights or different recoil system for the higher impulse ammo.

Here is what you may run into; If your gun is a Generation 2 G-20 you may be limited to specific recoil systems to fit the older generation 2.  22 lbs spring rate should cover most of your needs, 24 lbs might be needed for the most potent impulse ammo to control the slide velocities.

Sprinco or DPM systems are expensive but may help out in more ways if they are in fact available for your generation G-20.

[mlk3454]

I use a 22lb flat spring in my gen 3 G20 for mild to wild rounds. I rarely have any issues but when I do it is a failure to pull a round from the mag (I have 10 rounders here in NY) with some of the older mags that could use new springs.

I also have a 24lb spring but it makes racking the slide tough and the mild rounds may not fully extract with a new round chambering.

With either the 22 or 24lb springs the hot rounds still go a solid 10-15 feet and the mild drop within a step from where I am standing.

For the record I use a captured stainless rod and 99% of the time shoot from a 6 inch Storm Lake barrel.

[krafcheck]

Anybody go up on the fire pin spring?  I think stock is 5.  Go up to six?

[The_Shadow]

Wolff Gun Springs sends out a Striker spring with the recoil springs and if I recall it is an extra power..."5.5 Lb. factory strength striker spring"  http://www.gunsprings.com/index.cfm?page=items&cID=1&mID=5#top

Wolff does have;
Reduced Power....: 4, 4.5 and 5 Lb.
Factory Standard..: 5.5 Lb.
Extra Power.........: 6 Lb.

[mlk3454]

I have an extra power striker spring by Wolf but haven't installed it (only spring I haven't touched). I haven't had any light strikes with factory ammo or federal, Winchester, and CCI primers in my loads.

[krafcheck]

I went ahead and ordered a 22 pound spring. I also ordered a 6 pound trigger spring and 6 pound firing pin spring.  Didn't have to after I discovered the reason ( I think) for the light strikes.  I will post pictures tonight on a different thread.  But I compared the aftermarket barrel to the stock barrel by dropping a round in each one as suggested earlier in this thread. The aftermarket was visually deeper than the stock. Casing seated much deeper.

[The_Shadow]

Be sure to measure the casing you are using to insure it is in tolerance...0.9920" MAX and 0.9820" Minimum

With the MAX length casing the case head should not extend past the Barrel Hood!  If your chamber is cut too deep it will be below the barrel hood, but that shouldn't cause an issue as many guys shoot 40S&W from their 10mm barrels.

The main thing is that the slide returns to full battery for positive lock up.  Some people have seen their slides being held back (about 3/16") using an aftermarket barrel setup. 

[krafcheck]

Didn't get to mess with anything last night.  Daughter got her drivers permit yesterday so kind of busy.  I dropped in a 155gr. Hornady to test the depth.  Don't have a way to measure to those tolerances.  I am getting full lock up.

[smirker]

Who is making the 22 and 24 lb. flat wire recoil springs for the G20? Captive or loose flat wire?

[DarkCloud]

Who is making the 22 and 24 lb. flat wire recoil springs for the G20? Captive or loose flat wire?

I found mine at BrassStacker, seems they are recommended by several folks on the internet. IF ya have a gen 4 be sure to get that adapter for 10 bucks. I bought the stainless recoil rod, 22# flat wound spring and adapter and was 35 georgies for all, free shipping. This way I can use it in my gen3 or gen4 10mm

  DarkCloud