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Thread: 41 Mag mold "undersize"?

  1. 06-03-2005, 02:42 PM #1
    deerstalker
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    41 Mag mold "undersize"?

    Well I won a bid on e-bay, for RCBS 41 mag. mold, the question I got is it suppose to be .411 or .410? My neighbor has the same mold, and his drops a .411, mine is a .410. This is even after I run it thur a Lee sizing die. I may have to wait and see how it shoots out of my S&W. Thanks Rick..
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  2. 06-03-2005, 03:18 PM #2
    BruceB
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    G'day, Rick.

    My one-and-only .41 mould is the RCBS 41-210, which drops boolits at barely .411" and 217 grains in straight WW alloy.

    My Lyman sizing die is nominally .410 and actually sizes less than one-thousandth larger than that (i.e.: not quite .411"). My S&W Model 57, 8.375" barrel, shoots VERY cleanly with this un-hardened bullet and 17.5 grains of 2400. No visible leading at all, at all, and the accuracy is simply spectacular. This is likely the most-accurate conventional handgun/ammo combination I have ever owned, and that covers a LOT of ground.

    Try what you've got...it may surprise the dickens out of you. A thousandth +/- probably won't mean boo in the long run. ENJOY!
    Regards from BruceB in Nevada

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  3. 06-03-2005, 09:15 PM #3
    44man
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    Deer stalker, it is just fine! Have fun with it.
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  4. 06-04-2005, 01:05 AM #4
    Buckshot
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    Quote Originally Posted by deerstalker
    Well I won a bid on e-bay, for RCBS 41 mag. mold, the question I got is it suppose to be .411 or .410? My neighbor has the same mold, and his drops a .411, mine is a .410. This is even after I run it thur a Lee sizing die. I may have to wait and see how it shoots out of my S&W. Thanks Rick..
    What do your chamber mouths, and grooves mike?

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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
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LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check