In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.

H-375?

jsmith15jsmith15 Member Posts: 36 ✭✭
I bought some reloading supplies from a guy and he gave me some H-375 powder. I can't find much on it. What powder is this compariable to? It is still sealed and obviously old. Is it safe to load and shoot?

Comments

  • XXCrossXXCross Member Posts: 1,374 ✭✭✭
    edited November -1
    Haven't seen or used any H-375 since the 60's. If you have a specific Ctg. in mind I might be able to dig up some load data. Some of the early Speer loading manuals had some listings, but the powder wasn't on the market very long and didn't have a great following. I is a ball type powder and has a VERY long shelf life if it hasn't been improperly stored...too much heat or moisture.
  • jsmith15jsmith15 Member Posts: 36 ✭✭
    edited November -1
    CAn I use it for .243, or 22-250? I assume it is a rifle powder
  • XXCrossXXCross Member Posts: 1,374 ✭✭✭
    edited November -1
    It is a medium slow rifle powder and should work well in either ctg. If I can find data I'll post it or send you an E-Mail.
  • XXCrossXXCross Member Posts: 1,374 ✭✭✭
    edited November -1
    Gleaned this from the net...saved myself a lot of digging.

    H375 Powder Data


    From Handbook for Shooters and Reloaders, P.O. Ackley:

    "General Information - Surplus Powders"

    ".Reduce first test load by 5% from highest shown. If air temperature is more than 20? above test temperature, reduce first test loads a second 5% (Note: Test temperature is not mentioned in book). Work back up in half-grain increments. If primers are loose or seat too easily on subsequent reloading of case, reduce charge about 4%."

    Note: This was written by Hodgdon, himself

    Loading Data For Spherical H375

    Caliber - Bullet (gr.) - Powder Charge (gr.) - Velocity (fps)

    .222 Remington
    50 - 27.0 - 3033
    55 - 27.0 - 3004
    .222 Magnum
    50 - 31.0 - 3408
    55 - 30.0 - 3363
    55 - 32.0 - 3534
    55 - 33.0 - 3677
    .22-250
    50 - 40.0 - 3872
    55 - 37.0 - 3555
    60 - 36.5 - 3494
    .219 Wasp
    51.5 - 32.0 - 3512
    51.5 - 33.3 - 3802
    55 - 33.0 - 3609
    .220 Swift
    50 - 41.0 - 3798
    55 - 39.0 - 3519
    60 - 37.0 - 3323
    .243 Winchester
    75 - 40.0 - 3107
    90 - 37.5 - 2858
    105 - 35.5 - 2650
    .244 Remington
    70 - 46.0 - 3714
    75 - 44.0 - 3501
    85 - 40.0 - 3064
    90 - 39.0 - 2935
    105 - 36.0 - 2666
    .257 Roberts
    87 - 44.5 - 3148
    100 - 42.0 - 2925
    117 - 40.0 - 2659
    .270 Winchester
    100 - 57.0 - 3564
    130 - 51.0 - 3078
    150 - 49.0 - 2848
    170 - 47.0 - 2574
    7 x 57mm Mauser
    139 - 41.0 - 2566
    160 - 38.0 - 2377
    175 - 37.0 - 2239
    .30-'06 Gov't.
    150 - 55.0 - 2888
    180 - 50.0 - 2559
    .303 British
    130 - 47.0 - 2686
    150 - 45.0 - 2582
    .35 Whelan
    180 - 63.0 - 2766

    From Handloader's Digest, 3rd Edition:

    "Do not use the MAXIMUM loads listed until lower charges have been fired without any indication of excessive pressure. It is recommended that you start by reducing these loads by at least 10%."

    "'Maximum', here, is taken to mean those pressures which allow reasonable reloading of brass, normal working of action, etc. It is not intended to indicate pressures just under the bursting point of the gun or case."

    MAXIMUM RIFLE LOADS

    Caliber - Bullet (gr.) - Powder Charge (gr.) - Velocity (fps)

    .222 Remington
    40 - 27.5 - 3584
    45 - 27.0 - 3420
    50 - 26.0 - 3303
    55 - 24.5 - 3209
    .243 Winchester
    75 - 37.5 - 3513
    90 - 35.5 - 3225
    105 - 35.5 - 3070
    .244 Remington
    80 - 40.0 - 3532
    Reduce 6% for 6mm Remington
    .257 Roberts
    120 - 40.0 - 2863
    .30-30 Winchester
    170 - 37.0 - 2280
    .219 Wasp
    50 - 33.3 - 3802
    55 - 33.0 - 3609
    Above Wasp loads are maximum velocity.

    From Handloader's Digest First Ed.:

    "Spherical H375: Probably the best powder for the .219 Don. Wasp. It gives good performance in larger cases up to .30-'06. 1-lb. can $2.50, 20-lb. keg, $45."
  • jsmith15jsmith15 Member Posts: 36 ✭✭
    edited November -1
    Thanks for finding the info.
Sign In or Register to comment.