M1 Carbine vertical stringing

jcj54 · April 13, 2025, 05:23 AM

I have an M1 Carbine that I want to shoot in CMP games matches but it exhibits vertical stringing.
Any ideas on how to correct this?

Mannlicher · April 13, 2025, 08:29 AM

I have several .30 Carbines and I don't believe any of them have an issue with vertical stringing. The only thing that crosses my mind is to make sure all screws are tight and that there is nothing wrong with the bedding.

Dfariswheel · April 13, 2025, 07:36 PM

If you remove the hand guard and barrel band the barreled action should "hang" at an angle.
You should have to push the barrel down into the stock to assemble.

If this doesn't help, buy the Kuhnhausen Shop Manual on the M1 Carbine and start trouble shooting....

https://www.brownells.com/gear/books...e-shop-manual/

Shadow9mm · April 14, 2025, 06:44 PM

how much vertical stringing are we talking about?

How wide are your groups? basically what is the ratio of width to height?

What distance?

What ammo are you shooting, inconsistent ammo can contribute to vertical stringing.

jcj54 · April 16, 2025, 04:15 PM

In responding. I kept the target from the range trip so I could have the info but someone threw it away. Hope to get to the range and get that data written down.
Ammo used was the Korean surplus which others have had such good luck with.

jcj54 · April 22, 2025, 03:00 PM

Late WW2 Inland M1 Carbine with adjustable rear sight and bayonet lug.
After field stripping I discovered the recoil plate was loose and cracked.
This kept the action from proper tension in the stock. I obtained a replacement
recoil plate and the resulting proper tension solved the stringing issue.
My recollection of the target that showed stringing was from tge top of thec10 ring to 12 o clock in the 7 ring.
After replacing the recoil plate the group was entirely in the black scoring 95
I appreciate the guidance.

Shadow9mm · April 22, 2025, 05:24 PM

excellent! Glad it was a relatively easy fix!

April 13, 2025, 05:23 AM	#1
jcj54 Senior Member Join Date: February 28, 2011 Posts: 280	M1 Carbine vertical stringing I have an M1 Carbine that I want to shoot in CMP games matches but it exhibits vertical stringing. Any ideas on how to correct this?

April 13, 2025, 08:29 AM	#2
Mannlicher Senior Member Join Date: July 8, 2001 Location: North Central Florida & Miami Posts: 3,237	I have several .30 Carbines and I don't believe any of them have an issue with vertical stringing. The only thing that crosses my mind is to make sure all screws are tight and that there is nothing wrong with the bedding. __________________ Nemo Me Impune Lacesset "The trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so.".........Ronald Reagan

April 14, 2025, 06:44 PM	#4
Shadow9mm Senior Member Join Date: March 21, 2012 Location: Indianapolis, IN Posts: 4,590	how much vertical stringing are we talking about? How wide are your groups? basically what is the ratio of width to height? What distance? What ammo are you shooting, inconsistent ammo can contribute to vertical stringing. __________________ I don't believe in "range fodder" that is why I reload.

April 16, 2025, 04:15 PM	#5
jcj54 Senior Member Join Date: February 28, 2011 Posts: 280	Sorry for the delay In responding. I kept the target from the range trip so I could have the info but someone threw it away. Hope to get to the range and get that data written down. Ammo used was the Korean surplus which others have had such good luck with.

April 22, 2025, 03:00 PM	#6
jcj54 Senior Member Join Date: February 28, 2011 Posts: 280	Problem solved. Late WW2 Inland M1 Carbine with adjustable rear sight and bayonet lug. After field stripping I discovered the recoil plate was loose and cracked. This kept the action from proper tension in the stock. I obtained a replacement recoil plate and the resulting proper tension solved the stringing issue. My recollection of the target that showed stringing was from tge top of thec10 ring to 12 o clock in the 7 ring. After replacing the recoil plate the group was entirely in the black scoring 95 I appreciate the guidance. Last edited by jcj54; April 22, 2025 at 06:31 PM.

April 13, 2025, 07:36 PM	#3
Dfariswheel Senior Member Join Date: May 4, 2001 Posts: 7,554	If you remove the hand guard and barrel band the barreled action should "hang" at an angle. You should have to push the barrel down into the stock to assemble. If this doesn't help, buy the Kuhnhausen Shop Manual on the M1 Carbine and start trouble shooting.... https://www.brownells.com/gear/books...e-shop-manual/

April 22, 2025, 05:24 PM	#7
Shadow9mm Senior Member Join Date: March 21, 2012 Location: Indianapolis, IN Posts: 4,590	excellent! Glad it was a relatively easy fix! __________________ I don't believe in "range fodder" that is why I reload.