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Discussion Starter · #1 ·
My Marlin 375 loves the 200gr Sierras, but the 220gr Hornady's are just so-so in the accuracy dept.
I've been contemplating some new loads. Does anybody know if the 235gr Speer is designed to expand at 375W velocities? I haven't heard much talk about it, so I'm guessing not.
Thanks
 

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Besides obviously being a spitzer, Ken Waters mentions them as being a bad choice for the velocities that we are able to shoot this gun. Another choice, is of course the 250gr. Barnes. I have never used it. Are you using AA 1680? I have good luck with both bullets. (200 and 220). I also use the 250gr. cast bullet made by Beartooth.
 

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Which powders have you tried with the Hornady 220 gr bullets. The shoot very good out of my 38/55 with H335 powder.
 

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Discussion Starter · #4 ·
I'm using AA1680 and love it. For some reason I haven't had much luck with the 220's. The only time I had decent accuracy with the 220 was with RL-7, but it was very slow. It didn't even break the 2000fps mark. I may look into the 250 Beartooth cast bullet. I don't have much experience with cast, but willing to learn. My main reason for the pursuit is for a good hog load. The 200gr Sierra is awesome for a deer load, I'd just like something a little bigger for the pigs.
 

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Discussion Starter · #5 ·
big medicine said:
Which powders have you tried with the Hornady 220 gr bullets. The shoot very good out of my 38/55 with H335 powder.
Hey BM,
I've got plenty of H335, but no load data on it for the 375W. I use it almost exclusively with my 35REM. I would definitely be interested in trying it. Do you have any data?
Thanks
 

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I'm using 40gr.of 1680 and the 200gr. Sierra. I have no doubts about it handling a hog. Sierra claims its hard and with this accuracy, I'm trying it out this weekend. Didn't have the Hornady's loaded, so that's what I'm shooting.
 

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Duckbill,
If I get home over lunch I will get the data for you.
 

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Yea, Steelbanger found one for me last year. (I guess late last year or early this year???? Very accurate, and my only short gun that powerful except of course for the a,ahhha,. Winchester 356. only Marlin I don't have shooting cast regularly. (I guess cause its microgroove).
 

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Duckbill,
I didnt get home at lunch. I had a fractured leg come in and there went my lunch time. I will try to post it for you if I get home tonight. Hope it isnt a replay of Friday :cry:
 

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Try your .375 with 255 gr. Barnes originals with 34-36 gr. of IMR 3031. One of these should give you a good load. Velocities range from 1700-1900 fps. WLR primer.
 

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Here is an old post on loads for the 375

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Member # 6217 posted 08-02-2003 09:27 AM

Rifleranger hit it on the head.Forget the factory ballistics for the 375win.They are sadly very weak.When properly handloaded the 375win is on par with the 356Win,and a good 200yds+ elk set-up and a 250yd + deer round!Try this on for size.

Factory 200gr 2200fps
Handload 200gr Sierra 2390fps,38.0grs H4198

Factory 220gr 2100fps
Handload 220gr Hornady 2325fps,39.0grs RL-7

Factory 250gr 1900fps
Handload 255gr Barnes O 2000fps,37.0grs IMR 3031

In my Savage M99A or my Ruger #3 in 375win.I can push a 260gr Nosler to over 2100fps and a 210gr Barnes X to over 2400fps,SMOKING!!

The 375Win is a fine round,and shall take a back seat to no one!Conley offers loaded ammo for the 375win,200grs at 2450fps and 255grs at 2050fps.
 

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Discussion Starter · #14 ·
Thanks for all of the replies. I think I'm going to continue working with the HDY 220's. What got me thinking about the Speer 235gr was the Speer 220gr in the .35 caliber. I figured that the 35 cal bullet was designed for the lower velocities, so possibly they made a comparable bullet for the 375. Oh well :roll: .
 

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Discussion Starter · #15 ·
Well,
I got a chance to shoot a little this morning. I loaded the 220 HDY's with three different powders: IMR3031, RL-7, and AA1680.

First off I was really ticked off to find out my chronograph bit the dust, so I have no idea of the velocity.
I used the 3031 to sight in a newly acquired 4X scope. These were mild loads that grouped pretty well. I didn't want to use up my other powder on "sight-in" loads.

The AA1680 load was 38gr, which is backed off 2 grains below my previous max load. 6 shot group was around 2-1/4" @ 50yds :( . The last time I chronied this load it was around 2230fps.

The RL-7 load was 38gr which was a load I tried when I first got the gun a couple of years ago. This was before I learned about the crimp die. I tried it today with the crimp on and it performed a lot better. The 1st three shot group was 1/2" @ 50yds. The 2nd three shot group was 3/4" @ 50yds. According to my old records this load probably kicked between 2050 and 2100fps.

Over all, I was very pleased with the RL-7 load. However, this is bitter sweet. I used up the last of my powder on today's shooting. Hopefully I can get some more before gun season opens.

I may explore the H335 load as I have plenty of it.
 

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Discussion Starter · #16 ·
UPDATE

Well folks, I'm really glad I revisited the 220 HDY's. All it took was a little seating adjustment.

39gr AA1680 produced 1" @ 50yds
37gr H335 produced 5/8" @ 50yds
38gr H335 produced 7/8" @ 50yds

Unfortunately I had to send my chronograph in to be fixed :x so I don't know what they were clocking. The last time I shot the AA1680 load it was a little better than 2200fps. That'll work with the 220's. I don't think the H335 loads were very fast. POI was quite a bit lower than the 1680 loads.
Thanks for all of your input.
 

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Duckbill -

My .375 loves a combination of Rem 9-1/2 primers with 39.0g AA1680 and Hornady 220g bullets with a good roll crimp. When I do my part it can put 3 shots into about 2" or 2-1/2" at 200 yards.

Just saw your last post - glad the 220's seem to be working for you.
 
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