M1 Garand "Tanker"

[browningautorifle]

The way to find out what size your gas port is would be with a numbered drill bit...that way we have a start point. But is your ammo factory? And if so what?

[stovebolt_six]

I'm not ruling out an ammo problem either. The ammo I have was given to me, but has 7.62 R1 M1 A80 stamped on the head of the case.

[browningautorifle]

OK, sounds like ball of some kind, but I know that the IVI ball I had was old headstamp and had little power to cycle my M1 compared to new Rem-UMC ball. Maybe try a box of something new, or just different. The gas port measurement is still a big question though. Toothpicks vary...

[stovebolt_six]

I will get a size on the gas port as soon as I can, thanks all......

[browningautorifle]

Keep us info'ed on this one. We love to have an outcome...

[stovebolt_six]

The ammo I have has 7.62 R1 M1 A80 stamped on the head of case.

[browningautorifle]

Yes, you said that. I don't know what country it comes from or what it's history is...if it's been through lots of storage, it can be a bit degraded and not as powerful and reliable as it should be.

[stovebolt_six]

Ok all, I contacted the previous owner whom told me that the rifle functioned properly with the ammo I listed earlier, then the op rod broke. Since I've owned the gun, I've replaced everything except the trigger group, barrel, and stock. I disassemble the rifle again today and checked the gas port, a 1/16th drill bit fit through the hole. I did find a couple of spots that looked like the op rod was rubbing, so I greased those, and I will try shoot the rifle again to see if it operates correctly. Thanks all and have a safe and Happy Thanksgiving.........Clint

[browningautorifle]

1/16th is a lot I think. But that should be big ENOUGH. Op rod...broke? Interesting. Maybe too much gas and now the op rod's out of whack after repair?

[stovebolt_six]

I've replaced the op rod, and the spring, from Fulton Armory.