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Thread: 375 H & H with Hodgdon Universal Powder

  1. #21
    Boolit Master

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    No on dacron. I've heard always use filler and never use filler.
    Outpost75 (my hero) killed African beasts for years with no filler or gas checks.

    What would be an indicator that a filler would be required?

    762
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  2. #22
    Boolit Master
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    I would think hangfires, squibs, high shot to shot variation would be a sign. I often use dacron filler in my 375 H&H with 4759 powder. My definition of a filler, is a pea sized piece of dacron pushed down the case on top of the powder, expecting it to expand, and with careful handling, will keep the powder at the base of the case. I store and transport all my ammo, bullets up in the ammo case. I feel that the volume of the dacron is so small, it is consumed inside the case, and does not act as a secondary projectile. Using larger amounts of dacron is a different story, incurring greater risk of chamber ringing.

  3. #23
    Boolit Grand Master

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    375 H & H with Hodgdon Universal Powder

    Universal is extremely position sensitive. And the 375 H&H case is very large. Unless you’re point the rifle straight up before each shot and then level there could be large velocity swings. Doesn’t seem this way from your testing so far. But I’d want to keep the powder against the primer.
    Last edited by dragon813gt; 03-02-2019 at 09:18 PM.

  4. #24
    Boolit Master

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    I did point the rifle up before each shot to seat the powder against the primer.

    Tomorrow I will experiment with that. Fed 215 might have helped too.

    762
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  5. #25
    Boolit Master

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    More Numbers. 375 H and H.

    Back from the range. No dacron or filler. Tried the rounds from all positions, powder against primer, powder against bullet, powder flat on the bottom.

    15.0 grains Universal, Fed 215 PC cast 274..........1344, 1329, 1336, 1332, 1342, 1345, 1337, 1339, 1335, 1340.
    15.2 grains Universal, Fed 215 PC cast 274..........1351, 1348, 1359, 1350, 1343, 1347, 1358, 1349, 1355, 1345.

    Just FYI
    13.0 grains Red Dot, Fed 215, PC cast 274...........1251, 1247, 1251, 1244, 1253, 1250, 1239, 1259, 1251, 1248.
    13.0 grains Red Dot, CCI 200, PC cast 274...........1246, 1234, 1242, 1244, 1242, 1246, 1246.

    These are very mild loads in a 375. Most loads were 1" to 2" at 50 yards.
    762
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  6. #26
    Boolit Master
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    I am surprised your velocities are that consistent with no filler in such a big case with such light charges. Outstanding.
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  7. #27
    Boolit Master

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    I know. It's weird.

    Case = 2.84"
    Bullet = 0.61"
    Powder = 0.83"
    Air = 1.4" Wow.

    762
    Last edited by 762 shooter; 03-03-2019 at 08:43 PM.
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  8. #28
    Boolit Master

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    Another range session. Same boolit, CCI 200 primers.

    15.2 Universal..........1348, 1332, 1332, 1329, 1339.
    15.6 Universal..........1240, 1361, 1362, 1353, 1361.
    16.0 Universal..........1373, 1381, 1379, 1375, 1381. Best Accuracy
    16.4 Universal..........1396, 1402, 1403, 1403, 1396.

    13.4 Red Dot............1275, 1266, 1268, 1264, 1271. Best accuracy
    13.8 Red Dot............1296, 1267, 1272, 1270, 1269.

    I think the 1240 on 15.2 Universal was an chrony anomaly. That shot did not feel any different and hit the same place the others did. Seems pretty consistent over 60 rounds.

    762
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  9. #29
    Boolit Master

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    Update.

    Settled on 16.3 Universal. 1.5 inches at 100 yards.
    Model 70 375 H and H Safari Express.
    Fed 215.
    Lyman 375449 Powder coated and sorted to 2 grain increments. Casts at .378ish #2 alloy. Sized to .377 after coating.
    Brass mostly Hornady. Lee neck sized only. Loaded dozens of times so far. COL at 3.41. No crimp just straightened out slight bell.
    Velocity very consistent around 1400 FPS. No filler or gas check.

    Lead at $1.00/lb, 274 grain, 25 boolits/lb = .....0.04 cent/boolit.
    Primers = .................................................. ..0.04 cent
    Powder $189 for 8 lbs, ..................................0.054 cent
    Brass = N/A
    ------------------------------------------------------------------------
    0.13 cent/round

    Easy on the shoulder. Easy on the wallet. Hunting accuracy at 100 yds with a big heavy large meplat boolit.

    That 375 in your safe is calling to you.

    762
    Hope for the best, plan for the worst.
    My amendment can beat up your amendment.

  10. #30
    Boolit Grand Master

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    Quote Originally Posted by 762 shooter View Post
    That 375 in your safe is calling to you.
    I just found a box of sized, lubed and checked 378-275-FN about an hour ago. Was under a bag of rags on my bench. There was even a bag of brass w/ it. Brass was tarnished so it’s being cleaned. Just need to get a scope for the rifle. It got pulled off and put on on of my hunting rifles since the 375 is just a range toy.

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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