Got a mosin and a set of calipers?

[Datamancer]

Hey folks, I was hoping you could help me out. I know the engineering tolerances on some wartime Mosins are "loose" at best, so I'm trying to get a nice collection of data so I can better plan out the 10 round mosin mags. If you could take a quick measurement of each of the 3 stepped sections of the magazine for me, I'd greatly appreciate it. I guess while you're at it, mention the year, model and arsenal and maybe we'll see some patterns develop!




Thanks!

-~Doc~-

[Datamancer]

Guess I'll get the ball rolling...

In the pic is:

1942 91/30 Izhevsk

Small section- .362
Medium section- .510
Large section- .585

[MongooseV8]

1944 Finnish M39-Antique Receiver-Sako Factory

Small 0.3625"
Medium 0.5165"
Large 0.572"

[Fot]

I'll post mine tonight

[Palimino Stripe]

Do bear in mind that the magazine is hardly original to the barreled receiver. During the refurb process parts were completely mixed up. That being said you will get a lot of war-time manufactured pieces, but you will also get pre-1940 made ones a lot of the time as well. But I guess in theory the data will nonetheless show fluctuations...

-Palimino

[Reductio]

I know it's not wartime, but data is data, and I'm interested...

1952 Hungarian M44

Small section- .337 (All the way to the back, there's a step right around the pivot that's .315)
Medium section- .492
Large section- .574

[rromeo]

1917 Remington
Small section : .362-368
Medium section: .502-510
Large section: .581

[Datamancer]

I know it's not wartime, but data is data, and I'm interested...

1952 Hungarian M44

Small section- .337 (All the way to the back, there's a step right around the pivot that's .315)
Medium section- .492
Large section- .574

Thanks! All years and makes are welcome, not just wartime.

-~D~-

[mosinnagantm9130]

I don't think there will be any correlation to the year on the barrel shank, however, using the markings on the magazine we might get a pattern based on that timeframe. I'll get some of mine posted up in a bit.

[Vlad 11]

Interesting. The widths fluctuate quite a bit. These are measured at each transition (there are actually four 'sections' , the foremost being where the hinge-clasp goes)

Rough Wartime Izhevsk - mixmaster Tula 91/30
.368 - .373
.514 - .500
.590

Added on Edit:
(includes clasp section)

VKT M39 - 1898 SESTRORYETSK RECEIVER AND MAGAZINE
.330
.362
.504
.582

POLISH M44
.3235
.366
.516
.581

ROMANIAN M44
.3235
.358
.505
.585

IZHEVSK M44
.324
.3645
.505
.584

IZHEVSK Mag Refurb - Tula mixmaster exdragoon
.323
.361
.506
.580

IZHEVSK Mag Refurb - M38
.309
.3665
.517
.585

IZHEVSK Mag Refurb - 91/59
.323
.360
.490
.586

IZHEVSK Mag Refurb - M44
.3185
.354
.504
.5865

[Datamancer]

Interesting. The widths fluctuate quite a bit. These are measured at each transition (there are actually four 'sections' , the foremost being where the hinge-clasp goes)

Rough Wartime Izhevsk
.368 - .373
.514 - .500
.590

(more to be edited in when i can dig them out)

I wasn't too concerned with the front section because that's just for the hook, which can have a slight bit of wiggle to it. If you all feel like posting that measurement too, though, I'll take it. I'm mostly concerned with the inside width of the mags so I can size the follower. There's always a margin of error in manufacturing but if I can establish the mean, or middle, measurement, I can aim my own sizing right in the middle, too. Even so, something tells me to make this a viable commercial product, I'm still going to need to separate the batch into sm-med-lg parts based on the engineering/metal stamping tolerances and let people know that they might have to return them to me once or twice before we get one that perfectly matches their Mosin.

-~D~-

[pullnshoot25]

Re: Got a mosin and a set of calipers?

Bplvr, this is right up your alley!

[SixPointEight]

I'll post measurements if I can figure out how to zero my caliper to measure that direction lol

[flying2275]

Here's a random few I pulled for you. I can't wait till you can start selling these.

M39 1942 Finn "B" barrel. Remington marked magazine.
Small .368
Medium .514
Large .579

M91 1915 Izhevsk.
.359
.494
.586

M44 Chinese T53 1955
.362
.501
.585

[bplvr]

M44 Izzy 1946

front section ,1" long .350-.358
mid section ,1" long .500
minor rear section .512
utmost rear small section .600
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