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Thread: .240 Nitro & .333 Jeffrey

  1. #1
    GunLoad Trainee
    Join Date
    Nov 2008
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    Default .240 Nitro & .333 Jeffrey

    Does anyone have any load data on these 2 rounds? It's a new project that I'm working on and so far I'm drawing a blank.

  2. #2
    GunLoad Trainee
    Join Date
    Jun 2007
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    2

    Default Oldie British cartridges

    From: The Handloader's Manual of Cartridge Conversions, p.176, p. 391

    .240 Belted Rimless Nitro Express (.240 Apex)
    100-gr spire point - 39.0 grs. - 4350 - 2890 fps.

    .333 Rimless Nitro Express (.333 Jeffrey)
    275-gr spire point - 52.0 - 4350 - 2230 fps.

    Note: Powder maker not specified.

    From: Solving Problems in English, Handloader's Digest, 6th Ed., p. 31

    "The 333 Rimless Nitro Express'"
    250 Barnes SP - 59.0 - H4831 - CCI250M
    250 Barnes SP - 50.0 - Re21 - Western 8 ½
    300 Barnes SP - 48.0 - Re21 - Western 8 ½

    From: The Complete Guide to Handloading", p. 204

    .333 Jeffery
    250-gr. Barnes - 69.0 - 4350 (probably IMR4350) - in British cases w/British primers
    300-gr. Barnes - 64.0 - 4350 - in British cases w/British primers

    From: Handbook for Shooters and Reloaders, p. 345

    .240 Nitro, sometimes called .240 Apex
    "Kynoch loads the 100 gr spitzer bullets to 2900 fps. Doubtless, with our components and with cases formed from 06 brass, velocities could be boosted to the level of the .243 Winchester or better."
    Note: No loads given.

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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
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