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This topic contains 7 replies, has 3 voices, and was last updated by  Ed Harris 3 weeks, 3 days ago.

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  • #595

    Jason Chandonnet
    Keymaster
    #1778

    Ed Harris
    Participant

    Velocity vs. Barrel Length In .38 Special:
    Firearm:———————– Ruger SP101——Ruger Speed Six——–Ruger Service Six—–Marlin1894CB
    ——————————–.38 Spl. 2”—–_.357 Mag. 2-3/4”——-.38 Spl. 4”—————.38 Spl. 18”
    Ammunition:———–(cylinder gap at 0.06” Mean Assembly Tolerance Throughout)——Solid Barrel Carbine
    Winchester 110-gr. STHP—–851, 19Sd———-886,33Sd——————896, 35Sd————1037, 57Sd
    Winchester 125-gr. STHP+P–737, 14Sd———-not fired——————956, 39Sd————1159, 25Sd
    Federal 147-gr. JHP+P+-LE—-922, 15Sd———-952, 33Sd—————-1065, 40Sd———–1153,44Sd
    Win. X38SMRT 148 HBWC——-682, 25 Sd———734, 11Sd—————-783, 7 Sd————–879,13Sd
    Remington 148HBWC———–703, 5Sd————741, 25Sd—————-752, 14Sd————–850, 14Sd
    Norma 158LRN—————-721, 14Sd———-743, 14Sd—————-796, 14Sd————–985, 7Sd
    Win. X38SPD 158LHP +P——815, 16Sd———-831, 36Sd—————-879, 21Sd————–1093, 19Sd

    #1779

    Ed Harris
    Participant

    Table may be a dupe as it “disappeared” when I attempted to edit so I uploaded it again.

    Strange…

    #1786

    Nick Walker
    Keymaster

    Thanks Ed, welcome to the forum and thank you again for all the articles you sent.

    #1787

    Nick Walker
    Keymaster

    Thank you for the links and yes your articles will be made available to our members as soon as we can format them for the website.

    #1806

    Ed Harris
    Participant

    Another table from my test logs to keep people interested until Nick can format some of my articles for posting:

    Table 1 – Comparison of weight and dimensions Colt vs. Webley
    ________________________Webley Mark IV .380 (1950)____Colt Police Positive .38 Colt NP (1930)
    Barrel length:__________4”____________________________4”
    Overall Length:_________10.1”_________________________9.5”
    Height:_________________5.1”__________________________4.5”
    Weight:_________________26.5 ozs._____________________20 ozs.
    Cylinder Diameter:______1.45”_________________________1.40”
    Cylinder Length:________1.30”_________________________1.30”
    Cylinder Throats Dia:___.362__________________________.359
    Cylinder Gap:_________0.005PASS/0.006HOLD_______0.005PASS/0.006HOLD
    Barrel bore/groove:_____.355/.362_____________________.344/.354

    Table 2 – Velocity Comparisons Webley&ScottMark IV vs. .38 Colt New Police Positive

    Ammunition:__________________________Webley Mark IV_____Colt Police Positive
    Fiocchi 146-grain LRN factory load___750 fps, 19 Sd_____794 fps, 14 Sd
    Accurate 36-125T, 2.7 grs. Bullseye__761 fps, 10 Sd_____803 fps, 10 Sd
    “ “ “, 3.0 grs. Bullseye_837 fps, 16 Sd_____883 fps, 9 Sd
    Accurate 155D-146-gr.HP 3.0 Bullseye_794 fps, 15 Sd_____852 fps, 12 Sd
    Accurate 36-155D, 2.1 grs. Bullseye__640 fps, 8 Sd______671 fps, 11 Sd
    “ “ , 2.5 grs. Bullseye__710 fps, 16 Sd_____756 fps, 11 Sd
    Accurate 36-178D, 2.1 grs. Bullseye__595 fps, 10 Sd_____601 fps, 18 Sd
    Ideal 195-grain #358430 1.7 Bullseye_513 fps, 11 Sd_____Fat nose would not chamber in Colt
    Accurate 36-201D, 2.1 grs. Bullseye__601 fps, 12 Sd_____612 fps, 20 Sd
    NOE 201-grain Mk2, 2.1 grs. Bullseye_609 fps, 12 Sd_____629, fps 15 Sd

    Table 3 – Velocity of Factory .38 S&W Loads vs. Cylinder Gap and Barrel length:

    Firearm____________S&W 32-1______Colt_______Ruger______S&W Victory___Rook Rifle
    Barrel length__________2”_________4”_________4”________5”___________20”
    Cyl.Gap_pass/hold_0.004/0.005__0.005/.006__.004/.005___.008/h.009___Solid bbl. Ammunition_______________________________________________________
    FN Mk2z____________577,8 Sd____616, 10_____618,19_____571,22_____Bullet stuck in bbl!
    Kynoch 146LRN______623,26 _____649, 31_____650,22_____685, 22____848, 7
    WRA 146LRN (WW2)___659, 10_____701, 13_____727, 5_____681, 14____787, 14
    Rem-UMC 146 LRN____668, 22_____768, 14_____765, 15____754, 10___ 920, 14
    Fiocchi 146 LRN____706, 12_____809, 21_____820, 23____709, 24____985, 9
    R-P 146 LRN________603, 14_____674, 12_____697,18_____627,22_____790,10
    W-W 146 LRN________586, 18_____593, 36_____662, 29____620, 19____801, 12

    Column Mean________631_________687_________705________664________855

    • This reply was modified 12 months ago by  Ed Harris. Reason: format .xls tables for better display
    #2873

    Ed Harris
    Participant

    Nick,

    Can you see about postinng a grouping of the articles you guys like best on the Member’s Only portion of the forum? If some are of general interest but not quite a good fit for the Broadside due to length or whatever, put them up here. Maybe invite new members to post updates on their projects. Would be nice to have a mechanism to upload photos directly, if resized to a file size which displays OK on the screen, but does not hog bandwidth. Cast Boolits and similar forums limit photo file sizes to 500k, and participants are allowed 20MB of total file attachments. Once that limit is reached the older ones are purged and the new ones substituted. There should be software which would automatically resize photos to suitable size while virus scanning them.

    #3298

    Ed Harris
    Participant

    .38 Special Velocity Tests, November 19, 2019, 50 degs. F.

    Firearm: S&W Mod37 S&W Mod12 S&W .38-44HD Remarks:
    Barrel length 1-7/8″ 2″ 4″
    Cyl. Gap 0.008 0.006 0.006

    Ammunition:
    Ball M41 130FMJ RA66 732 fps, 23 Sd 742 fps, 30 sd 832 fps, 31 Sd Vietnam-era military for Airweight revolver
    Ball M41 130FMJ WCC68 721 fps, 20 Sd 766 fps, 32 Sd 779 fps, 28 Sd Vietnam-era military for Airweight revolver
    Winch. 130 FN “Service Grade” 739 fps, 22 Sd 771 fps, 5 Sd 846 fps, 11 Sd Current production “range” ammo
    Avg. vel. of 130-grain ammos 731 fps———760 fps———819 fps

    Speer 135GHHP 4.1 Bullseye 710 fps, 19 Sd 772 fps, 18 Sd 808 fps, 20 Sd Good exp.(water jugs) fr Mod12, but not Mod37 Needs >750 fps

    WRA 148 HBWC 638 fps, 14 Sd 687 fps, 9 Sd 694 fps, 20 Sd Vietnam-era training ammo, factory target wadcutter
    R-P 148 HBWC 3.2 Bullseye 770 fps, 9 Sd 797 fps, 17 Sd 845 fps, 11 Sd “Full Charge” wadcutter handload.

    Rem-UMC 158″Police Service” 697 fps, 14 Sd 733 fps, 11 Sd 787 fps, 23 Sd WW2-era police service
    WRA 158 LRN “Lubaloy” 699 fps, 19 Sd 720 fps, 14 Sd 756 fps, 7 Sd WW2-era police service
    WRA “cut-off”_ 146 FN” 729 fps, 19 Sd 757 fps, 12 Sd 791 fps, 19 Sd Nose cut in trim die to 1.40″ ctg. OAL with .25″ meplat
    RWS 158 FMJFN 659 fps, 33 Sd 694 fps, 20 Sd 681 fps, 10 Sd Current production “range” ammo
    Avg. vel. of 158-grain ammos 696 fps———726 fps———754 fps

    Charge establishment with Magtech 158-grain LRN to approximate old factory lead service
    4 grains Bullseye, OAL 1.50″ 717 fps, 6 Sd 752 fps, 19 Sd 782 fps, 11 Sd RCBS Little Dandy Measure rotor #7
    3.7 grains 452AA, OAL 1.50″ 702 fps, 13 Sd 719 fps, 10 Sd 742 fps, 20 Sd RCBS Little Dandy Measure rotor #7

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