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Thread: 41 magnum gas check size

  1. #1
    Boolit Grand Master


    Join Date
    Apr 2017
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    Aberdeen, South Dakota
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    41 magnum gas check size

    I am looking all over for the answer, as there seems to be a huge range of gas check shanks for 41 caliber's. Sage's lists 3 different sizes, and oddly the "416 rifle" size seems to be the most common for 41 caliber handguns. Both NOE and Accurate have 41 mag designs with a .391" shank. While not a big difference, Sage's lists .393" as the correct shank size for 416 rifle, while I have yet to find a design that size.

    I am designing a mold, and would like to know which one, if any, is more popular or common than the others.

  2. #2
    Moderator Emeritus


    JonB_in_Glencoe's Avatar
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    Mar 2010
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    That is a good question that I can't answer.

    Maybe you'll find an answer in one of these two threads?

    http://castboolits.gunloads.com/show...-vs-Shank-Size

    http://castboolits.gunloads.com/show...num&highlight=

    I currently have 3 different 41 molds that are GC designed...and they each need a different GC.
    One is a bit different than the 3 common sizes available, so I asked Sage's Outdoors what I he could do, he sent me seven different samples (variations of material thickness) to find one that worked. One did work and I ordered a bunch (lifetime supply) of those.
    ~~~~~~~~~~~~~~
    “If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun.”
    ― The Dalai Lama, Seattle Times, May 2001

  3. #3
    Banned








    Join Date
    Mar 2005
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    most never molds are cut for the 416 style check. Older molds were all over the place. even lymans from different years were different. the added to that problem was back in the day there was only lyman checks and at that time they didn't crimp on. so when a guy shot his 41 he left a trail of gaschecks that would lead him right up to his target.

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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