M1 Garand spent cases, an observation

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sikacz
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M1 Garand spent cases, an observation

Post by sikacz »

I’ve had some minor tweaks I’ve made to the M1 Garand, nothing major just correcting minor annoyances. The gas plug kept loosening up during range trips. At first it would cause the sight to wobble and by the end of shooting would be visibly crooked. Fixed by preening the splines, a procedure described in a M1 Garand maintenance manual. The plug continued to loosen during range trips, so I decided to switch to a ported gas plug and see if that had any effect. It did. Last trip the plug did not loosen and additionally the spent brass was less damaged. The two pictures show a more dimpled set which was prior to the switch and the less damaged cases are from the last outing with a ported gas plug. The ammo in both cases was the PPU 150gr for the M1 Garand.
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Re: M1 Garand spent cases, an observation

Post by Eris »

Interesting. I've never recovered my brass to check it, but I did change the gas plug as the first thing I did when I got the gun. I wanted to make sure I'd never have to worry if I accidentally used the wrong ammo.
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Re: M1 Garand spent cases, an observation

Post by sikacz »

Eris wrote:
Wed Sep 18, 2019 2:21 pm
Interesting. I've never recovered my brass to check it, but I did change the gas plug as the first thing I did when I got the gun. I wanted to make sure I'd never have to worry if I accidentally used the wrong ammo.
A wise precaution.
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Re: M1 Garand spent cases, an observation

Post by lurker »

i've seen that.
i've been told to use automotive anti-sieze on the gas plug

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Re: M1 Garand spent cases, an observation

Post by sikacz »

Originally I wasn’t interested in changing the plug, but one thing led to another and I did. Not really intending to shoot anything but 150gr , still it’s an old rifle and old things don’t need the stress.
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Re: M1 Garand spent cases, an observation

Post by sikacz »

lurker wrote:
Wed Sep 18, 2019 2:46 pm
i've seen that.
i've been told to use automotive anti-sieze on the gas plug
It really had the opposite problem, it wasn’t seizing. LoL.
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Re: M1 Garand spent cases, an observation

Post by NuJudge »

Your groups will be a lot larger if your plug is loose. Be gentle cranking on that plug. If you are vigorous cranking on the plug, you may loosen the gas cylinder on its splines, that hold the gas cylinder to the barrel, and mess up your accuracy more. I have not just a plug wrench, but another wrench that holds the gas cylinder directly.

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Re: M1 Garand spent cases, an observation

Post by lurker »

should have asked earlier, where are youse guys getting your ported plugs?

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Re: M1 Garand spent cases, an observation

Post by shinzen »

This is the one you want.
http://www.garandgear.com/ported-gas-plug.html

And yeah, I have the same plug and experience with less abused brass, which makes reloading a much more pleasant experience.
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Re: M1 Garand spent cases, an observation

Post by Marlene »

I've never worried about one of these for reasons of unsuitable ammo, but the idea of brass being less murdered is very appealing.
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Re: M1 Garand spent cases, an observation

Post by shinzen »

Normally I wouldn't worry about accidentally doing it- it did save me from not being able to shoot the Garand a few years ago at the MITM though, as there was no garand safe food available. The less mangled cases is definitely a great side effect, and should be emphasized on the for sale page of that thing though.
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Re: M1 Garand spent cases, an observation

Post by offensivename »

An interesting and not technically garand related side note. Those mangled .30-06 cases look almost exactly like what the German K-43 does to 8mm Mauser. I don't reload my the 8mm yet but I wonder if I could solve that with one of the other gas piston plugs I got when I swapped the original gas system out for an aftermarket.

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Re: M1 Garand spent cases, an observation

Post by lurker »

offensivename wrote:
Sun Jan 19, 2020 12:30 pm
one of the other gas piston plugs I got when I swapped the original gas system out for an aftermarket.
certainly worth a try. something is out of time and whacking those case mouths.

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