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Thread: 22 Spitfire/5.7 Johnson

  1. #41
    Boolit Master
    Join Date
    Feb 2006
    Location
    Kaneohe, HI
    Posts
    2,235
    I think I've found the best load for this rifle.
    11.5 of 2400. 40g Sierra .223 bullets
    1 1/2 at 50yds. No soot.
    Started at 10.5 and worked up to 12.0.
    11.5 and 12.0 no difference.
    I'll load more rounds and move to 100yd accuracy.
    Getting closer.
    Be off this Sunday. Sister in town.

  2. #42
    Boolit Master
    Join Date
    Mar 2005
    Location
    Hodgenville, KY-Lincolns Birthplace
    Posts
    712
    FWIW
    Manual of Catridge Conversions pg 709
    40gr/spire/14.0gr-2400 /2850fps/Nonte
    50gr/spire/14.0gr-IMR4198/2700fps/Barnes

  3. #43
    Boolit Master
    Join Date
    Feb 2006
    Location
    Kaneohe, HI
    Posts
    2,235
    In my earlier testing I did try some 14.0gr loads.
    Little to hot. to me

  4. #44
    Boolit Master

    Newtire's Avatar
    Join Date
    Mar 2005
    Location
    Star, Idaho
    Posts
    2,580
    Each gun is a different story for sure but good advice to start low as we know. Sure looks like 2400 is going to be hard to beat. Any of those powders around that burn rate would be worth a look see.

    Any info on primers used?

    This is a pretty good bunch of information on a cartridge about which there really isn't much info written on. Great work guys!

  5. #45
    Boolit Master
    Join Date
    Sep 2011
    Location
    san antonio, tx
    Posts
    515
    Newtire,

    Fwiw, when I was "way down South", one of the Civil Guard guys had a US .30 M1 Carbine converted to the .22 Johnson Spitfire & used it for hunting both 2-footed & 4-footed quarry.

    I cannot remember either sort of "game" getting away after being hit with that little carbine.

    BEST WISHES, tex

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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