Cast in early Glock 22

[Hornady]

I know this has been beat to death. And I know some cast for there Glock pistols with factory Glock barrels, but I want to put this out there a little different, as in Glock pistol specific.
This being, an early model Glock model 22.
In this gun you have the polygonal barrel as with all Glocks, which increases pressure in the barrel design. And can increase the potential for leading. Which would greatly increase the pressure of the already high pressure 40 S&W round,
In the early Glocks you have the defect of firing out of Battery, so minimal leading or bullet lube build up could cause, an out of battery firing,
The early Glock 22 unsupported barrel issue seems to be greater than the newer versions.
In my Glock 22 Mid range loaded brass needs to be run threw the Redding G-RX die, which in turn work hardens the base of the brass making it likely to fail in this area.
It just seems to me shooting lead in the early Glocks 22 would not be worth the risk.
I know this will cause a controversy but, I am talking about only the early model Glock 22 in 40S&W.

[MullahElRon]

Not I.

[rjrivero]

The polygonal rifling doesn't cause an increase in pressure per se. In fact, you could argue the opposite.

The polygonal rifling has less friction offered to the bullet and allows greater velocities compared to traditional rifling.

The "leading" of the polygonal rifling has been often debated. There is no doubt that you *may* see excessive leading, and the traditional rationale of increasing the velocity to improve the seal of the base of the bullet to the bore seems to make it worse.

It seems that the decreased friction offered by the polygonal rifling is the issue that causes this phenomena. The lead bullet moving at too high a velocity does not have enough friction on the rifling to start spinning the bullet. As a result, the bullet will "jump" the rifling, thus causing the malformation of the base, and gas cutting of the bullet resulting in excessive leading in the barrel.

The traditional thinking of increasing the pressure makes this worse and can lead to "badness."

If I was to shoot a cast bullet in a polygonal rifled firearm, I would use a harder than usual bullet at a slower velocity. I would increase the velocity until I started seeing leading, and a decrease in accuracy, and then back up from there.

However, the GLOCK PARY LINE IS NO LEAD BOOLITS IN GLOCKS.

[Hornady]

As to a polygonal barrel increasing pressure, all that I have read and not on forms, would indicate to me that the idea of some gun makers going back to the Polygonal barrel, was a better gas seal, thus increase in pressure.
But with every debate there are two sides.
The reason I posted this, I was over to the cast boolit sight, and several had stated in a post titled (old wife’s tales).
Many stated that the statement, cast bullets should not be shot in Glock factory barrels was just that, an urban legend.
Now most of the guys over there are very knowledgeable as to cast bullets. And if they are of proper size and significantly hard, cast bullet can be fired in the newer Glocks.
And I do not doughty this. Not that I have any plan on doing so. But to say cast can be fired in all Glocks in my opinion is a statement that has the potential to go very wrong very fast. But then this too is an opinion of a poster on a form.

[craig110]

No matter which side of the polygonal barrel / cast boolit debate ultimately ends up being correct if this ever gets settled, my view on it is rather simple: If I'm doing something that involves 35K PSI pressure (9mm) near body parts that I'd rather not have messed up (i.e. hands, arms, face, etc.) I'll err on the side of caution. Rather than wait for the "experts" to settle the issue, I bought a non-controversial lead-friendly barrel so that I'm not participating in the debate with each trigger pull.

[gokyo]

Yup call the folks at LWD and buy your hands and eyes insurance policy for 100 bucks.

Do it. Please

[Frostback]

Yup call the folks at LWD and buy your hands and eyes insurance policy for 100 bucks.

Wish I had that option. I have an older G23 (SLxxxUS). Any handgun with a barrel length 105mm or less (4.13") is classified as a prohibited weapon. If you owned it prior to Feb 1995, you can continue to own it, and even buy other guns of that classification that are in the country. No new units can be imported (LEO and military exempt of course). The barrel itself is listed as a prohibited device, so I can't get a replacement, unless it is 106mm long or better. This would then remove the G23 from prohibited status, but it could not be converted back to original. The original barrel must be turned in for destruction. That isn't going to happen.

Then there is the problem of getting a barrel OUT of the US. It can be done but requires a bunch of paperwork, including a $500 export permit.

I just use a 170gr LSWC cast with ACWW and lubed with Lars red. I have found that using a medium speed powder also reduces any leading. I use a mild dose of HS-6 with good results. It doesn't lead any more than my BHP or Firestar in 9mm do.

Frosty

[Brass Nazi]

As to a polygonal barrel increasing pressure, all that I have read and not on forms, would indicate to me that the idea of some gun makers going back to the Polygonal barrel, was a better gas seal, thus increase in pressure.


Yep, The way I was taught was all else being equal a higher pressure results in a higher velocity.

[John@JCDLESales]

Yup call the folks at LWD and buy your hands and eyes insurance policy for 100 bucks.

Do it. Please

I Strongly Concur!:cheers2:

[blueline541]

I have maybe 10k cast bullets down the polygon barrel of my HK USP .40. Accuracy is plenty good enough for bowling pins, steel plates and paper. The barrel does lead up so I scrub it with Chor-boy every 200 to 300 rounds and keep on shooting.