RotoMetals2ADvertise hereWidenersMidSouth Shooters Supply
Titan ReloadingRepackboxLee PrecisionInline Fabrication

Results 1 to 7 of 7

Thread: Original Low Wall 32-20 pressure question

  1. #1
    Boolit Mold
    Join Date
    Jun 2017
    Location
    Northern California
    Posts
    3

    Question Original Low Wall 32-20 pressure question

    I picked up an original Winchester 1885 low wall made in 1888 in 32-20. I'm currently loading 115 grain bullets over 17 grains of FFg goex or about the same triple 7 with a .030 wad. does anyone know the pressure of 32-20 black powder? I am also looking at loading smokeless in this action. specifically HP-38 which I have on hand. hodgdon load data says starting load at 3.2gr for a pressure of 11,100 CUP, looking up the triple 7 load data from hodgdon 18 grains they put at 12100 CUP. I know there is more going on then just the peak pressure but would that load of HP-38 be OK for a low wall rifle. I plan to mostly stick with black powder but am working on a poor accuracy problem and want to avoid black powder fouling before I decide if I want to have a barrel liner installed.
    Thanks for any info.

  2. #2
    Boolit Grand Master



    M-Tecs's Avatar
    Join Date
    Apr 2008
    Location
    Minnesota
    Posts
    5,495
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  3. #3
    Boolit Mold
    Join Date
    Jun 2017
    Location
    Northern California
    Posts
    3
    Thanks for the info M-Tecs. its deferentially pointing me in the right direction. I'm always happy to read and learn anything I can.

  4. #4
    Boolit Grand Master



    M-Tecs's Avatar
    Join Date
    Apr 2008
    Location
    Minnesota
    Posts
    5,495
    Your low wall will have the older black powder era firing pin size. The ones I looked at have been .125 but I have read claims that the early used even larger firing pins??? With the .125" and pistol primers I would not go over 25K in a Hi-Wall or Low Wall. Since your are not close to that pressure just info.
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  5. #5
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    7,227
    Some of my .32-20 firing data might be helpful.


    Factory .32-20 Ammunition in Rifle and Revolver
    Ammunition Description___________Colt Police Positive 5”_____Savage Sporter 25”


    Rem-UMC 100-grain lead
    Kleanbore “Dogbone” box 1930s______898, 44 Sd, 116 ES________1302, 15 SD, 38 ES

    Peters 100-grain softpoint
    Kings Mills, Ohio 1940s______________870, 28, 71______________1150, 44, 137

    WRA 100-grain lead
    Red & yellow box 1950s_____________854, 33, 87_______________1263, 18, 53

    W-W 100-grain lead
    Rounded primer, yellow box, 1970s____800, 11, 31______________1241, 9, 22

    W-W 100-grain lead
    Flat primer, white box, 1990s_________778, 27, 69_______________1172, 18, 65

    R-P 100-grain lead
    Bridgeport, CT 1970s________________780, 24, 67_______________1181, 17, 52

    R-P 100-grain lead
    Lonoke, AR current production________716, 21, 55_______________1140, 12, 35

    Column Mean by Gun_______________5” Revolver______________25” Rifle
    Average Velocity of Factory Loads_____814 fps._________________1207 fps



    Group 1 Standard Pressure Loads for Rifle or Revolver

    Bullet, Little Dandy#, Pdr. Chg.____Colt Police Positive 5”______Savage Sporter 25”


    Remington .311” 100-grain JSP____930 fps, 16 Sd, 45 ES________1230 fps, 26 Sd, 79 ES
    LD#4, 4.9 grains AutoComp

    Accurate 31-105T
    LD#1, 3.2 grains TiteGroup_________858 fps, 22 Sd, 61 Es_______1133 fps, 30 Sd, 67 ES
    LD#4, 3.2 grains Bullseye__________861 fps, 19 Sd, 47ES________1173 fps, 18 Sd, 54 ES
    LD#3, 4.5 grains AutoComp________912 fps, 19 Sd, 53 ES _______1260 fps, 21 Sd, 55 ES
    LD#4, 4.9 grains AutoComp________ 943 fps, 32 Sd, 71 ES_______1315 fps, 32 Sd, 118 ES
    LD#10, 7.5 grains Alliant #2400_____991 fps, 24 Sd, 65 ES_______1348, 29 Sd, 69 ES DO NOT EXCEED!
    LD#13, 10.0 grains IMR4227_______985 fps, 25 Sd, 61ES________1280 fps, 53 Sd, 176 ES
    LD#17, 13 grains IMR4198________974 fps, 21 Sd, 94 ES________1326 fps, 46 Sd, 138 ES

    Accurate 31-114D

    LD#3, 3.0 grains Bullseye_________741 fps, 35 Sd, 92 ES________1041 fps, 26 SD, 78 ES
    LD#4, 3.2 grains Bullsye__________861 fps, 20 Sd, 54 ES________1173 fps, 18 Sd, 52 ES
    LD#13, 10.0 grains IMR4227______962 fps, 27 Sd, 62 ES_______1268 fps, 62Sd, 224ES
    LD#15, 11.5 grains IMR4198______777 fps, 43 Sd, 101ES_______1248 fps, 36 Sd, 114 ES
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  6. #6
    Boolit Mold
    Join Date
    Jun 2017
    Location
    Northern California
    Posts
    3
    Quote Originally Posted by M-Tecs View Post
    Your low wall will have the older black powder era firing pin size. The ones I looked at have been .125 but I have read claims that the early used even larger firing pins??? With the .125" and pistol primers I would not go over 25K in a Hi-Wall or Low Wall. Since your are not close to that pressure just info.
    cool thanks for the info in the firing pin. off hand i think its the .125 but will double check and read up. as for pressure i'm likely to stay as low as i can, i'm always a little paranoid about pressure.

    also thanks for the numbers Outpost75. especially as i was looking at both those molds just yesterday. definitely got some thinking to do and probably some powder to go pick up.

  7. #7
    Boolit Master uscra112's Avatar
    Join Date
    Jun 2006
    Location
    Switzerland of Ohio
    Posts
    3,152
    For some years now I've used 12,500 psi as the maximum pressure that black powder can generate, when estimating loads in Quickload. Forgotten now where I got that - maybe from the now-defunct site that Ulrich Bretscher maintained. I know of no actual pressure test data from any stateside experimenter. According to a source I just consulted, SAAMI lists 16,000 psi as max for the .32-20 cartridge.

    Working backwards in QL, a 1200 fps MV from a 24" barrel with the 3118 bullet in the .32-20 cartridge, selecting powders in the 4227 speed range, the pressure would only be about 8500 psi area. This is very much off-the-cuff, so make of it what you will. But I think I must revisit the 12,500 number.
    Last edited by uscra112; 09-16-2019 at 02:48 AM.
    flectere si nequeo superos, acheronta movebo

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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