25acp Eibar mfg pre WW II feeding - Pistolsmith
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Old 05-28-2014, 09:18 AM   #1
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25acp Eibar mfg pre WW II feeding

My 1st post guys, hope I'm putting it in the right place. This is with reference to a Spanish Mfg 25acp semi auto, a project gun for me, my 1st time tinkering. I have dies, bullets, and make my own ammo. My fmj's chrono close to factory velocity. I use a 50 gr fmj and Bullseye and Unique. Problem is the original magazine was destroyed and a gunsmith in Massachusettes supplied me with one, it works most of the time. I got another from Sarco, and the top cartridge rides a fraction of an inch higher than the other one. Occasionally when feeding the nose of the cartridge shoots straight up thus wedging between the slide and the barrel hood. Any ideas or tips? Thank you.

Bill
 
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Old 05-28-2014, 04:01 PM   #2
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The "usual" in these cases is the crappy quality after market magazines.

For that there just isn't any "fix" other than to keep buying magazines until you get lucky and get one that works.
Since most of the magazines for these old foreign guns are all made by the same company whose quality is crap, it's just luck of the draw.

Other than that, all you can do is find a gunsmith who's willing to spend time with it altering and tuning a magazine in hopes he can get one to work.
This amount of skilled labor may cost more than the gun is worth.

Sorry, there just aren't any good answers for this problem.
 
Old 05-29-2014, 02:57 AM   #3
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I have two mags, one is untouched and works 95% of the time, the other i played with, carefully bent the rear lips to hold the cartridge longer and lower and polished all surfaces with a Dremel and compound. Another questionable point is just what factor does the tension of the recoil spring play in the mechanics of feeding vs slide excursion speed etc. It ejects fine, really throws them out. I got a few springs from Wolf that actually are hammer springs for a Dan Wesson revolver. I gave them the dimensions of the capturing rod, they fed the data into their computer and came out with these springs. They are stiffer than the original and a perfect fit on the rod. Yes, it is a project!
Bill
 
 
Old 06-12-2014, 03:45 PM   #4
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higher vs lower

Back to the Spanish 25, one of the mags presents the top cartridge a little higher than the other mag and feeds better. Am I correct in assuming since it rides higher (maybe 3/16") the mechanics of feeding occur quicker, ie. less "ride" time to get into position up and out with the nose getting into the chamber a split second faster. My loads are all the same plus or minus one or two 1/1000" OAL, same consistent 1.3 gr of Bullseye thrown from my Lyman #55. I keep the chamber clean, no limp wristing. It just seems to me that there is one single mechanical variable that's causing this nose up feed issue. Thanks for any insight!

Bill
 
Old 06-13-2014, 04:06 PM   #5
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This may come down to the shaping of the feed lips of the magazine.
These poor quality replacement magazines usually have feed lips that are only generally shaped properly.

Depending on the gun design it may also be the location of a magazine locking notch.

Don't damage the mag, but you can try re-shaping the feed lips to alter the angle of release or change the release timing of the cartridge.
This is in itself an art.
 
Old 06-15-2014, 08:31 PM   #6
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Quote:
Originally Posted by oneillwj View Post
Back to the Spanish 25, one of the mags presents the top cartridge a little higher than the other mag and feeds better. Am I correct in assuming since it rides higher (maybe 3/16") the mechanics of feeding occur quicker, ie. less "ride" time to get into position up and out with the nose getting into the chamber a split second faster. ...
To add to what DFW said: Should you care to invest the time/money, for the mag that rides lower, you can field strip it, take the body to a shop where they are used to welding on thin metal (muffler shop?). Then get them to put a small bit/bead of weld on the upper part of the cut which engages the mag catch.

Next you will have to smooth inside and out, then carefully file the lower edge so that the mag will ride higher, thus presenting the cartridge higher on the breechface of the slide. Care must be taken when making the new cut so the mag feed lips won't contact the slide when the mag is fully inserted.

I suggest you make dummy rounds (no primer and no powder) for testing. Should you care to try tuning the lips yourself, you must carefully observe how rounds are feeding when it is impossible to fire the gun. If you want to reshape the lips, use something like a big nail or door hinge pin as a mandrel and, with mandrel in place of round, press a lip against something hard but not gritty such as a piece of wood. If you need to bend a lip slighty outward, either bend it against the mandrel or use something to expand it such as closed needlenose pliers inserted then carefully opened. I suggest NOT grabbing the lips with pliers; you may chew them up and have more problems.

Remember: before you start studying/working the lips, you must have the mag riding high enough for proper presentation. ALSO you must have observed and determined EXACTLY what is proper feeding. Otherwise your efforts will come to naught.

You will need a lot of patience to try slightly bending lips over and over as you CLOSELY observe feeding with the dummy rounds.
 
Old 07-29-2014, 07:07 AM   #7
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If you already have one that works properly, just work the lips of the mag till they are exactly like the one that works. While your at it take out the spring and stretch it. That will make a big difference in how well they feed.


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Old 09-28-2014, 07:56 PM   #8
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I had a friend with the same problem. It was cleared up when he stopped using 25 ACP ammo and used 6.35 ammo. The differences in older pistols designed for ammo having a double ogive, and the single ogive 25 ACP modern cartridge may create this issue due to the bullet design, and the ramp.
I hope this will help.
 
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