IBM .30M1 sn 3675209

There is no marking on the barrel near the front sight, therefore I think the barrel has been replaced.

Thanks for the info. The MN magazine is slightly larger than the other one (IS). But the MN almost always gives a misfeed at the last 2 cartridges. The MN magazine is a tight fit in the carbine whereas the IS is looser. But the IS magazine always feeds correctly, no misfeed so far.

Thanks for the info, I'll check that.

I'm shooting my carbine now for a few months..........standing 1st rank still in our local club match ranking, because there are not too much shooters that shoot this expensive ammo, about 20 guys, (but the ex-gunnery sergeant that was ill for a few months, my trainer, is slowly catching up with me........) .This is a kneeled score on a 25m target.......
I'm feeling I'm reaching the end of improvement now..........followed a few US army rifle marksmanship video's and stuff.............Is there a way to improve my carbine (or me) to get ahead of Gsgt cathing up with me?

Thanks, I think my carbine (bought it as a shooter, not a real collector piece) has been modified a lot before I bought it for 200 euro's, see the pictures above. It belonged to an older shooter that had to stop because of health reasons.  In Holland it is obgligatory to shoot at least 18 times per year, the police checks that in your logbook (every time you shoot the logbook is signed by a board-member of the club).

Hi to my Luxemburg neighbor, you live quite nearby compared to many other guys around here, of course you can jump in, its always nice to have a worldwide chat on carbines.
I see many carbines for sale online in the US, note that I bought my IBM (non original, very much tampered with, shooter, not collector) for only 200 euro's. But that is the normal price here in Holland for a carbine in this shape. They are actually not so popular b ecause of the expensive ammo and not many clubs have a match for it. Since I'm member of an ex- Dutch Marines Shooting club, it is very popular however in my shooting club. Many of the old guys here actually served and fought with this gun in the East Indies and Korea after WWII. The match type is therefore called "veteran service rifle" for that reason.
There are actually no markings at all on the barrel, therefore I think it is a Dutch gunsmith retrofit.
PRVI is not difficult to buy here, it is the standard brand carbine ammo, and the cheapest. This evening after work I bought 3 boxes of PRVI for 19 euro's each. Not cheap, but anyway, I love my carbine, right? It's about the same price as the Magtech .45ACP I also bought.
When I told the guys if they have cleaner burning carbine ammo than PRVI and S&B those two guys looked at me like: "What the he,l is he talking about, it's a very old rifle, so it needs a lot of cleaning and carressing: what the heck. And tjey are RIGHT!" Treat this old warhorse with respect and clean it as much as possible. It worked hard in WWII, Korea and Vietnam, so it deserves to go like some kind of gun-sauna, right?
Need to start with reloading though, ammo brass gets more and more expensive each year........about 15 years ago a box of CCI .22LR was 2,50 euro, now it is already 4,50 euro's (and rising).....
What scores do you get with your carbine at 50 meters compared to my standard 25meters official KNSA paper target? Where do you aim and how did you adjust your sight? You're shooting prone at 50mtrs right, whereas I can only shoot standing and kneeling at our inhouse range. With the standing position I have most problems......much worse than this, that is where the gunnery Sgt. is quickly cathing up with me, need to improve on the standing position, but how?
- I am already following an US army training video with right elbow way up
- I'm using the hasty sling, well adjusted
- I breathe correctly
- Feet standing apart correctly
- Natural firing position (check with eyes closed and then opening) perfect on target
- Good trigger pull

All, tips are welcome here. Please help because I really want to win the club match this year! I'll have to improve myself, not the rifle, to win.....Maybe shoot even more than 2x per week?

I also asked the son of the shop owner for advice, This guy kniws his stuff, he's an upper grade "amurier" from the Liege armorer school (where FN Herstal is situated). He told me that for example that recrowning is a very tricky job that must only be done when absolutely necessary. And believe me, this guy knows his stuff. If you see those hi-tech ultra heavy rifles he's building for the Dutch southern shooting guilds that shoot enormous large heavy lead balls with it (they call it "bullkes")......wow man, you then know what I mean.....

So....improvement has to come from myself, not the rifle (come on, its only 25 yds......)

Hopefully you've seen this: http://thecmp.org/wp-content/uploads/CarbineNotes.pdf

After accomplishing all that advice, and trying some different ammunition, you've done about all you can without upgrading to a better barrel (like a Criterion unit from Fulton Armory).

No benchrest, only prone.

Typically guys complain of the carbine shooting high at 25 yards. I believe the consensus is that the bullet is still rising and not fully stabilized.
Have you had this issue?