M1 garand adjustable gas nut

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Your first link seemed to be more a tech article of how/why then the product itself. But I just skimmed it a bit.
Check out this from Fulton Armory (they have been in business and showing at Camp Perry during the National Matches for all of the last 20 years and I don't know how long before that --I wasn't there before then). I've bought this system, and a fair amount of parts, books, etc from them. Always good stuff and good service.

http://www.fulton-armory.com/gascylinderplugsystemwinterchangeableadjustablejets.aspx

I DID buy this product about 1996. It has worked great. You have to experiment with the different "jet" sizes. I usually start at the biggest and work down until it just cycles. With slow powders, I've found even the biggest jet gives 'energetic" cycling. The old school on judging pressure was to shoot M2 Ball and see where the empties fell. Then shoot your loads. If they fell forward of the M2 ball cases (towards the target more) the pressures were lower at the gas port. As the pressures rose, the cases fell back farther (from 2:00 to 3:00 to 4:00, etc). When they fell BEHIND (farther away from the target) then the M2 Ball cases, your port pressures were higher. You have gone too far. Action cycle speeds and cycling part energies are too high and battering your rifle. This works with the "issue" ejector plunger spring. Those "lightened" by various methods to put all your cases at 12:30 to 1:30 landing just beside the muzzle (as in match prepped rifles) MIGHT NOT ALLOW YOU TO SEE THIS.

The adjustment method works for either style "gas relief" port (hour links or mine).
 
Thankyou for that link BBDart.

Forgive me if this is a redundant thread. I honestly do try to use the search function. I just havnt perfected it yet. lol
 
I have both the Schuster and McCann gas screws.
The Schuster works best if you are wanting to set for one load and not keep adjusting the screw.
The McCann works best if you wish to shoot several differing loads as you find the screw that works best with each individual load, mark the screw, I color code them with paint and keep a log noting which color goes with which load.
As stated, slow burning powders will still eject the cases pretty hard.
I have found it best to stick with commercial hunting loads that do not exceed 165 grain bullet weight and no "light Magnums" or any loads advertising "increased performance".
I avoid all commercial loads of 180-220 grains in the M1 Garand even with an adjustable gas lock screw. HTH
 
Im really leaning to the Garand gear one. I just dont want to worry about the hasstle of changing setting. I dont plan on shooting super heavy or hot loads. Just dont want to worry about the regular old over the counter stuff and different brands. I dont plan on shooting super heavy bullets either.
 
I've used the second (schuster) and it works well. Basically I've adjusted it to the point where it will cycle 180 gr. soft points with about the same pressure as ball ammo, and it still cycles the ball just fine. I haven't had to adjust mine for more than a year. The one thing you should do eventually is take it off and clean it after a lot of rounds to get the carbon off of it. The only issue I had was getting it tight when installing it. To solve that I just used a piece an old sawzall blade and ground it to the right width so that it would fit in the slots on the gas plug and then turned it with pliers.
 
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