I picked up a nicely sporterized Mexican 7x57 a couple of years ago and it shoots very well with H4350 and the Barnes 150 TTSX. However, I have to keep the OAL to the max in the manuals and I can't get long enough to touch/backoff from the rifling due to the original magazine box length and whatever the throat is. Is there a way to lengthen the magazine box and still have proper feeding?
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MEXICAN 7x57?
- Thread starter Burke
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sable tireur
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Is this the original military barrel or has it been replaced with a modern barrel?
The book or SAAMI cartridge length for the 7x57 Mauser is 3.071" OAL which you magazine should accommodate, my Mexican does. Is your trigger guard/bottom metal is the original Mauser factory style then the box is integral with the trigger guard. The alternatives are:
- Cut off the box and weld on a new box of longer length. This also entails the necessity of adjusting (machining) the action to accommodate the new box. This is neither for the faint of heart or the amateur wannabe gunsmith.
- Call Wyatts Outdoors; https://wyattsoutdoor.com/product-category/internal-magazine-boxes/ to discuss this with them. These are usually just magazine boxes, not complete trigger guard and boxes.
- Call or email; http://www.hoosiergunworks.com/catalog/mausers.html to discuss with him.
- Sunny Hill is a custom manufacturer and might have something to adapt; https://www.sunnyhillgunparts.com/products.html
Most bottom metal these days is oriented to the Detachable Box Magazines. You can try Atlasworx (Australian) as he has helped others before but it won't be cheap. https://atlasworxs.com/
If you are willing to cast your chamber and throat, you'll have more information to work with. If your barrel is the original military barrel, the other option is to simply replace the barrel and have it chamber the way you decide you want it and to work with the original SAAMI specifications and the bottom metal.
Best of Luck!
The book or SAAMI cartridge length for the 7x57 Mauser is 3.071" OAL which you magazine should accommodate, my Mexican does. Is your trigger guard/bottom metal is the original Mauser factory style then the box is integral with the trigger guard. The alternatives are:
- Cut off the box and weld on a new box of longer length. This also entails the necessity of adjusting (machining) the action to accommodate the new box. This is neither for the faint of heart or the amateur wannabe gunsmith.
- Call Wyatts Outdoors; https://wyattsoutdoor.com/product-category/internal-magazine-boxes/ to discuss this with them. These are usually just magazine boxes, not complete trigger guard and boxes.
- Call or email; http://www.hoosiergunworks.com/catalog/mausers.html to discuss with him.
- Sunny Hill is a custom manufacturer and might have something to adapt; https://www.sunnyhillgunparts.com/products.html
Most bottom metal these days is oriented to the Detachable Box Magazines. You can try Atlasworx (Australian) as he has helped others before but it won't be cheap. https://atlasworxs.com/
If you are willing to cast your chamber and throat, you'll have more information to work with. If your barrel is the original military barrel, the other option is to simply replace the barrel and have it chamber the way you decide you want it and to work with the original SAAMI specifications and the bottom metal.
Best of Luck!
sable tireur
Well-Known Member
- Joined
- Oct 8, 2010
- Messages
- 3,964
During my years as an apprentice, we made all of our own trigger guards/boxes. Manual mills removing lots of steel. This was only way to get the proper size and shape for the actions which were also custom made in the shop.
It is not always necessary to have to touch the lands with a bullet. This is an older idea often promulgated by the benchrest community. We did use a jam method when fireforming some cartridge cases though.
It is not always necessary to have to touch the lands with a bullet. This is an older idea often promulgated by the benchrest community. We did use a jam method when fireforming some cartridge cases though.
