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Thread: 375 Winchester in a single shot

  1. #1
    Boolit Buddy curioushooter's Avatar
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    375 Winchester in a single shot

    Has anyone pushed their 375 Win Ruger#3 or Contender/Encore (RIFLE) to the max? I mean seating heavies out far and stuffing as much powder as will fit in there? If you have, what kind of velocities were observed?

  2. #2
    Boolit Buddy Doughty's Avatar
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    cshooter,

    Back in the day I played at this some with a Ruger #3 in .375 Win using the Lyman 375449. I tried several powders that I had. IMR 4891 worked pretty good. Then I tried AA2015. It shot better by a significant amount. At about 1900 fps it gave the best accuracy. It would go faster, just not accurately. In those days I was using straight wheel weights and sizing to .377 because that was "the" lead I had and "the" sizer I had and the best knowledge I had. This setup was good, dead on, to about 125 yards. I didn't have a practical range finder in those days. Even though this load would pop the lever open on my Marlin .375 I always wanted "more." I eventually reamed the chamber out with a .30-40 Krag reamer and then enlarged the neck. I then increased the bullet weight and velocity until it would really set my shoulder back and rattle my teeth. Nowadays, after shoulder surgeries, I'm back down to a 300 grain bullet and velocities below 1700 fps. I've been thinking about trying something with a 250 or 225 grain bullet.
    Good luck if you decide to go down this road.
    AKA "Old Vic"
    "I am a great believer in powder-burning".
    --Theodore Roosevelt, Hunting Trips of a Ranchman

  3. #3
    Boolit Master
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    To answer the question, no I haven't. I would caution that factory pressure in the 375winchester is ALL a Contender can stand with that head size, a G2 might be different.In a Ruger or Encore, let your shoulder/cheekbone be your guide. I don't have anything to hunt that a 38-55 level load won't kill plumb dead! Ymmv
    “You don’t practice until you get it right. You practice until you can’t get it wrong.” Jason Elam, All-Pro kicker, Denver Broncos

  4. #4
    Boolit Master

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    I shoot a Ruger #3 with a max load of RL7 and a 200 grain soft point Sierra. Plenty of power for anything you may be hunting and enough recoil to satisfy the most masochistic. I am curious as to why you would?
    Before you embark on a journey of revenge, dig two graves.”

    ― Confucius

  5. #5
    Boolit Master Drm50's Avatar
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    I'm working with 375Wins right now. I had a Marlin 375Win but traded it off because I wanted to use
    the flattest shooting loads possible. Now working with #3 Rugers and my brothers TC carbine. In #3
    we are loading the Speer 235g semi spitzer / 34.5gr IMR-4198. I've worked to this point .5 gr at a
    time. Worked from 4198 loads for 220 Hornady bullet. The book Max is 33.0g with the 220g bullet.
    Not compressing the load yet. The Speer 235 has no cannulure and I'm only using a light crimp. No
    signs of pressure yet. The Spitzer bullet improves groups at 100yds and other bullets (FNs) don't come close at 200yds. I'm getting right at 1.25" average at 100yds and 2.5" at 200yds. The longest
    distance I have shot it. So far we have shot 200gr Sierra, 220gr Hornady, 255gr Win that are for the
    38/55 & 375 W. Also the Speer 235gr , Win 270gr Silver tip and 300gr Hornady RN intended for the 375 H&H. So far we have used only IMR 3031 & 4198. I'm trying to crank flattest shooting load I can
    that is accurate. I don't know velocity, got no chrony and don't really care what fps is. I'm thinking
    about 2000-2100 fps from published velocities of the 220gr loads. We pushed the 220gr with book
    Max of IMR-4198 which is a compressed load with no signs of pressure. I wouldn't bother to do this
    with 375W except it's legal for Deer here in Ohio and looks to be best cartridge to work with. I wish
    I had a longer barrel rifle, the #3 is not a target gun. The ideal 375W would be a 788 Rem 30/30
    rebored to 375w. There are powders that are a little hotter, like RX7 and other shotgun powder. I
    don't have any yet. The trouble with 375w bullets is by the time you get a efficient Spitzer it would
    have to be a good bit longer making it heavier & slower.

  6. #6
    Boolit Master
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    Quote Originally Posted by curioushooter View Post
    Has anyone pushed their 375 Win Ruger#3 or Contender/Encore (RIFLE) to the max? I mean seating heavies out far and stuffing as much powder as will fit in there? If you have, what kind of velocities were observed?
    The limiting factor will be the thin cases. If you have it rechambered to 375 JDJ you'll have a much better cartridge for what you want to do. The Contender will handle the loads listed in the Hornady Handbook or Hodgdon website just fine. Note however, that the case is voluminous and will hold more of some powders than is wise. Stick with recommend loads.

    http://www.hodgdonreloading.com/

  7. #7
    Boolit Master Drm50's Avatar
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    I believe 375 JDJ has a bottle neck. If we were allowed bottle neck cartridges we wouldn't be fooling
    around with 375win. I wouldn't own a 375win if there was something better that was legal. You can
    only do so much with straight wall cartridges reguardless of caliber. Then the added handicap of large
    caliber forces most into short stubby bullets.

  8. #8
    Boolit Buddy Jedman's Avatar
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    I have a Marlin M 375 levergun and a H&R handi rifle I built in 375 Win. Neither is as strong as your Ruger but you have a slightly shorter barrel. I have played with 200 and 220 gr jacketed bullets and have stopped at book max loads. Unless you have the case capacity of the 375 H&H you really can't get a flat shooting load that's approximately comparable to a 30-06 with bullets you would use on big game so I no longer push it hard.
    Now I use my Marlin with jacketed bullets and a 4 X scope the handi rifle I use with a Lee 250 gr. Cast at about 1450 fps with a red dot sight.
    I think it is about our best choice in a strait walled deer cartridge here in OH.

    Jedman

  9. #9
    Boolit Master

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    When the 375 Winchester came out the reamer companies were selling 38-55 chamber reamers marked 375.. There's only .065" difference in case length. While the 375 may not be as accurate if shot in a 38-55 chamber because of the extra length I think the 38-55 brass will take the pressure. This is where the designers mess up, making a high pressure cartridge that will fit in a black powder rifle, jumping from 30,000 to 50,000 psi.

  10. #10
    Boolit Master
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    When restricted to straight walled cases, the 357 Maximum is hard to beat!

  11. #11
    Boolit Master Drm50's Avatar
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    I had the Marlin 375w, fine shooting rifle. The only reason I got rid of it was because I wanted to
    shoot Spitzer bullets. The #3 did outshoot it with 220gr, but just by average of .5" at 100yds. When
    we first got into 375w we had only 30 brass. We blew out 30/30 cases but we only shot heavy 38/55
    loads in them. The 30/30 & 38/55 are the same case and I wouldn't use jacketed bullets and full power 375w loads in them. With the #3 I think about 2200fps is going to be the top with accuracy.
    With 200g Sierra you may squeeze out more but accuracy will be terrible. They aren't much good
    past 100yds when loaded hot. I shot the 235g Speer for years in a Sako 375H&H at 2850fps will good accuracy. I shot several deer with it. I have a large stash of 375 bullets from the 375H&H to
    experiment with. The #3 with short barrel has its limitations but is good enough for Ohio deer. If I
    was going out of state were I could use bottle necks I wouldn't be using 375w.

  12. #12
    Boolit Master
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    Quote Originally Posted by Drm50 View Post
    I believe 375 JDJ has a bottle neck. If we were allowed bottle neck cartridges we wouldn't be fooling
    around with 375win. I wouldn't own a 375win if there was something better that was legal. You can
    only do so much with straight wall cartridges reguardless of caliber. Then the added handicap of large
    caliber forces most into short stubby bullets.
    I do believe that is the reasoning behind straight wall calibers being legal.....so there won't be Howitzers lobbing cannon over hill and dell.
    "What makes you think I care" ........High Plains Drifter

    Rick C.

  13. #13
    Boolit Master Drm50's Avatar
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    Quote Originally Posted by hpdrifter View Post
    I do believe that is the reasoning behind straight wall calibers being legal.....so there won't be Howitzers lobbing cannon over hill and dell.
    We got the Howitzers and Morters covered with straight cases. We would like to have some legal guns. Gun is defined as direct fire weapon. I know what you mean though. Ohio is mostly flat and
    that is where all the cities are. I know they have to draw the line some where. You just wonder how
    they came up with regs. Many of the legal weapons are higher velocity than most of classic deer cartridges.

  14. #14
    Boolit Buddy curioushooter's Avatar
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    Some of Ohio is flat--the northern half. The Southern half can be nearly as rugged as WV or KY, where pretty much any cartridge goes.

  15. #15
    Boolit Master
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    A friend of mine bought a .375 Win in a Ruger #3 carbine.
    He loaded maximum pressure loads of Reloder 7 and the 220 gr Hornady. He also tried some other loads with 300 grn Sierra spitzers.
    Due to the small case the ballistics were not anything special.

    He then bought a Ruger #1 in .375 H&H. I think it produced the power he wanted but with more recoil than he expected. He then traded off the #1.
    EDG

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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