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Thread: 1891 Argentine re-barrel caliber?

  1. #41
    Boolit Bub 405grain's Avatar
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    Apr 2012
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    Modesto, Ca.
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    36
    Pacific tool and gauge carries the 9.5x57 MS chambering reamer. As per the above post, reloading dies are available. Internet search indicates that people have the least amount of problems when forming the cases from 30-06 brass (which is plentiful), and there are lots of 375 molds to choose from. I ordered a contoured 375 barrel blank this morning. Now I need to start scratching together my nickels and dimes for the other stuff. The pool of knowledge on this site and the way people offer good advise is why I really like it. Building a Mauser in this caliber is going to be so much better than a 35 Remington.

  2. #42
    Boolit Mold
    Join Date
    May 2007
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    Jacksonville, AR
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    28
    I'm going to order my reamer from Manson. I'm going to send him a dummy round so he can match the reamer to the cases I will make. I'm building mine on a Herters U9 action. The action is currently a 308 but it is a intermediate length action and my cases feed without issue. Like you, I'm still scratching together my nickels and dimes.

  3. #43
    Boolit Master
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    Dang it guys, I don’t need any more guns but now I want to build one of these.
    Some people live and learn but I mostly just live

  4. #44
    Boolit Bub ronniet's Avatar
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    Jan 2015
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    Sorry, been away as late and haven't gotten back to do any update. I did trade for a new set of 9.5x57 MS dies RCBS in the old cardboard box never used, how lucky can one be? I have all the parts to do the build. I checked the 9.5 rounds in the 91 magazine and reciever.
    Used some dummy rounds made to COAL of 2.900 and acted like they were made to use in the single stack magazine. Although didn't have a barrel on it they did feed well from the mag, but the 265gr cast boolits were not completely rounded on the ends and had a flat on them and did want to hang up on the edge of the feed ramp, something that could easily be fixed with a more tilted follower or a more rounded nosed boolit.
    I did see EDG's post about the pressure and that is a first I see of the pressure at 55,000psi, from all I have gathered in load books and internet information on the round has it in the 43,000-44,000+ psi range and the pressure is always formost of my concerns when I build something as our builds should be safe as we will not be the only owners of them, as we all will pass them down or get rid of them.
    So we need to be sure of the safety of each build.
    I started the build because of the large caliber and low pressure I had read about but always safety first.
    I am using a DWM 1891 action and bolt, and reduced size magazine that will be cut flush with the stock bottom, will have a hinged straddle type floorplate like that of a 98 Mauser hopefully the rifle will carry 3 rounds.
    I am using a 96 Swede FP, CP, shroud and FP spring, a Buehler 96 Safety, a Timney 1891 NOS trigger, Welded low profile Brno type bolt handle , A NOS Bishop semi inletted Mannlicher stock, Hand made Mannlicher nose cap , thru the stock handmade Stirrup type sling swivel like those of the Ruger Internationals, Kick EEZ Nitro pad in case it kicks more than I want to feel.
    I have a new CM Barrel which is a 1-12 Twist Medium Varmint profile at 28 Inches but I have turn it down and thread and chamber it yet and cut to length.
    I have not found a Reamer as yet or a set of Headspace gauges so this is all on the back burner till I gather the rest of the stuff.

    I have one like this already in the original 7.65x53 caliber (because its a great caliber) using the same stuff but on a Sporter length stock.

    It uses the original barrel ( no steps) and cut at 25" long. I Rust blue all my guns. I will post a pic or 2 of the 7.65. If I figure out how to do that. The 7.65 is listed at over 56,000 PSI if I am not mistaken?
    Ron
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  5. #45
    Boolit Bub ronniet's Avatar
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    A few more pictures of the 7.65, these were made before I cut the mag flush with the bottom of trigger guard and I mounted a 2.5x7 Weaver Steel tube wide view on it. the tip and caps are African Blackwood and African Paddock wood, The Recoil pad is a Pachmayr Decelerator.
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  6. #46
    Boolit Grand Master Texas by God's Avatar
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    That is a very good looking rifle, Ronnie! Personally I would not worry about the pressure with your conversion. A good friend of mine had a custom single shot 1891 with a heavy Sako Barrel in 22 - 250. We fired hundreds if not thousands of high-pressure loads at prairie dogs and targets over a span of decades and never saw any indication of the action failing. Your 9.5 should be lower pressure than that.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check