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My first M1 Carbine
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witchdoctor33 View Drop Down
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Joined: Jul 22 2025
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    Posted: Jul 24 2025 at 6:25pm
I picked up an Underwood M1 Carbine, at a local auction.  I feel like I got a pretty good deal.  They also had 400 rounds of handloads that I picked up, for about a third the price of new ammo.  It shoots well.  Still need to get it zeroed a little better.  The rear sight kept slipping out of the 100 yard mark and I didn't notice.
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Smokpole View Drop Down
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Points: 1484 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Smokpole Quote  Post ReplyReply Direct Link To This Post Posted: Jul 24 2025 at 6:36pm
Looks like you got a decent post WWII rebuild. If you can't fix the problem with the rear sight let us know. I'm sure I have a spare that you can have for free. Welcome to the forum. You have a lot to learn and this is the place to do it.
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Points: 7 		Post Options Post Options   Thanks (0) Thanks(0)   Quote witchdoctor33 Quote  Post ReplyReply Direct Link To This Post Posted: Jul 24 2025 at 6:49pm
This is great site with lots of information. I'd already looked through bunch of post, before I joined. I had no idea Underwood made them, until I got this one. That's when I started looking here and found out about the rebuilds, too. 
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Points: 2352 		Post Options Post Options   Thanks (0) Thanks(0)   Quote painter777 Quote  Post ReplyReply Direct Link To This Post Posted: Jul 24 2025 at 7:51pm
I wonder if that's a Circle K stock.
But seems they had a number stamped along with the Circle K.

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Points: 874 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jond41403 Quote  Post ReplyReply Direct Link To This Post Posted: Jul 24 2025 at 9:04pm
welcome to the forum! Looks like you scored you a beautiful Underwood rebuilt carbine. I love my rebuild Winchester because rebuilds ooze service history. They are as the military intended them to be. Good score!
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Points: 3640 		Post Options Post Options   Thanks (1) Thanks(1)   Quote W5USMC Quote  Post ReplyReply Direct Link To This Post Posted: Jul 24 2025 at 10:38pm
Originally posted by witchdoctor33 witchdoctor33 wrote:

The rear sight kept slipping out of the 100 yard mark and I didn't notice.

Not sure if this is the case but if you are pushing the rear sight peep all the way forward until it bottoms out that is not a correct setting, and the peep will move back up under recoil. The 100 yard setting is before the sight bottoms out. 
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Points: 650 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DonFlynn Quote  Post ReplyReply Direct Link To This Post Posted: Jul 25 2025 at 12:32pm
Nice. I would be leery on the handloads unless you know and trust the loader, but that's me
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I took a picture with some oblique lighting to see if it stood out any more
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I just moved it all the way to the rear and then pushed it forward once for each marking.  The last one, for 100, doesn't have as positive a click as the rest of them.
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Originally posted by DonFlynn DonFlynn wrote:

Nice. I would be leery on the handloads unless you know and trust the loader, but that's me

The ammo has worked well, so far.  Each box is marked with lot numbers and load details
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Originally posted by witchdoctor33 witchdoctor33 wrote:

Originally posted by DonFlynn DonFlynn wrote:

Nice. I would be leery on the handloads unless you know and trust the loader, but that's me

The ammo has worked well, so far.  Each box is marked with lot numbers and load details


Let's just hope the reloader didn't make a mistake. Odds are you'll be fine but you just never know. Most shooters or reloaders only shoot the ones they reload themselves, usually don't trust other unknown reloaders reloads. Almost a tongue twister haha
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Originally posted by witchdoctor33 witchdoctor33 wrote:

I just moved it all the way to the rear and then pushed it forward once for each marking.  The last one, for 100, doesn't have as positive a click as the rest of them. 

In the picture you posted the sight is pushed past the 100 yard marking and will move backwards when firing. The line should be even with the 1, stop pushing at the last forward "click". 
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Originally posted by W5USMC W5USMC wrote:

Originally posted by witchdoctor33 witchdoctor33 wrote:

I just moved it all the way to the rear and then pushed it forward once for each marking.  The last one, for 100, doesn't have as positive a click as the rest of them. 

In the picture you posted the sight is pushed past the 100 yard marking and will move backwards when firing. The line should be even with the 1, stop pushing at the last forward "click". 

thanks for the information.
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Originally posted by Jond41403 Jond41403 wrote:

Originally posted by witchdoctor33 witchdoctor33 wrote:

Originally posted by DonFlynn DonFlynn wrote:

Nice. I would be leery on the handloads unless you know and trust the loader, but that's me

The ammo has worked well, so far.  Each box is marked with lot numbers and load details


Let's just hope the reloader didn't make a mistake. Odds are you'll be fine but you just never know. Most shooters or reloaders only shoot the ones they reload themselves, usually don't trust other unknown reloaders reloads. Almost a tongue twister haha


Thanks.  I've always bought new ammo but these were cheap enough that I thought I'd give them a shot.Wink 

Bought some new, as well.
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Smokpole View Drop Down
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Points: 1484 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Smokpole Quote  Post ReplyReply Direct Link To This Post Posted: Jul 25 2025 at 7:17pm
I'm a reloader and I will tell you that that particular load is identical to my favorite. It is a bit on the mild side, but I wouldn't change it. It functions all of my carbines dependably and is quite accurate in my rifles. As long as the loader paid proper attention to his loading technique, You should be fine. There is no room in the case for a double charge because the load as properly assemble is a slightly compressed charge.
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Points: 116 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Smoky 1 Quote  Post ReplyReply Direct Link To This Post Posted: Jul 29 2025 at 11:45am
Welcome to the club. You have a nice caebine.
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Points: 31 		Post Options Post Options   Thanks (0) Thanks(0)   Quote A Seabee Quote  Post ReplyReply Direct Link To This Post Posted: Aug 17 2025 at 10:55am
My Rock-Ola that I picked up earlier this year had the same problem with the same rear sight, somehow lost it's detent ball and spring. Changed it out with another H shield milled one I got from a guy on CMP forum
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