I am having a rifle rebarreled to the new 375 Ruger caliber. I would like to know if anyone has worked up any load data for the 375 Ruger.

I don't want to reinvent the wheel (or redo the research and development).

Thanks in advance,

SD Shooter

SD,
Did you ever get any .375 Ruger info?

Normally Hornady supplies loading data when they sell dies for ammo that is new and has no reloading data.....did you get your dies from Hornady?

My apologies for not responding sooner.

My 375 Ruger dies came today from Hornady. But there was no load data with them. I have also Emailed Hornady Customer Service but have gotten no response. I guess I will give them a call on the phone and see if I can do any better.

I did find some very limited information on the Nosler website that was very specific to their bullets. I already have some Nosler 225 & 250 gr. that I bought for the 375 H&H, so I can at least start with those.

If you have any suggestions I am anxious to know.

Thanks

SD Shooter

It's disappointing that Hornady supplied no data with the dies.....

However as long as the .375 Ruger is a larger case than either the .375 H&H and the .375 Taylor then either of these two cases can be used as starting points and work up.
I'd start about 8% under mas listed and work up from there.

Here is some data, please take it with caution!

Bullet Powder Charge OAL Velocity

Hornady 225 SP H414 90 3.41" 3068
Hornady 225 SP H4350 86 3.41" 2938
Hornady 225 SP H4350 88 3.41" 3019
Hornady 225 SP H4350 89.7 3.41" 3100
Hornady 270 SP H4350 85 3.413" 2783
Hornady 270 SP H4350 86 3.413" 2828
Hornady 270 SP H4350 87 3.413" 2875
Hornady 300 FMJ H4350 84.7 3.349" 2782
Barnes 210X Varget 76 3.297" 2965
Barnes 210X Varget 78 3.297" 3029
Barnes 210X H414 88 3.346" 3085
Barnes 235 XLC H4350 88.2 3.361" 2940
Barnes 235 XLC H414 88 3.351" 2970
Barnes 270 XLC H414 86.1 3.357" 2975
Barnes 270 TSX H414 86.1 3.331" 2856
Barnes 300 TSX H4350 84.7 3.366" 2757
Sierra 200 JRN H414 87 3.16" 3032
Sierra 200 JRN H414 88.2 3.16" 3055
Sierra 200 JRN Varget 85.2 3.16" 3300
Hornady 270 SP (Factory Load) 2758

I've had a 375 wildcat for a few years, based on the 9.3X64 Brenneke.

The internal dimensions of the case are almost identical to the 338 Win Mag, so slightly less than the new 375 Ruger cartridge.

Here are my loads for the Nosler and Hornady 300 grain bullets:
68 grains RL 15, Win. large rifle primer
2,450 fps Hornady
2,470 fps Nosler Partition

I started at 60 grains of RL 15 and worked up slowly to maximum.
66 grains, 67 grains, and 68 grains of RL 15 all gave very close velocities.

When I hit 69.4 grains, pressure changed dramatically, velocities with the Nosler jumped to 2611 fps, and bolt lift became hard, with flattened primers.

68 grains RL 15 remains my hunting load.

Garrett

Hey Guys,

An Email response came last night from Hornady. It had extensive load development data for the 225 SP, 270 SP and the 300 FMJ RN. I compared the information with data for th 375 H&H in several reloading manuals and found the 375 Ruger to run slightly less on powder charges across the board.

If anyone needs this data let me know and I will be glad to forward.

And thanks for all of the input on your posts.

SD Shooter

quote:

An Email response came last night from Hornady. It had extensive load development data for the 225 SP, 270 SP and the 300 FMJ RN. I compared the information with data for th 375 H&H in several reloading manuals and found the 375 Ruger to run slightly less on powder charges across the board.

Can you please post it here?

quote:

Originally posted by SD Shooter:
Hey Guys,

An Email response came last night from Hornady. It had extensive load development data for the 225 SP, 270 SP and the 300 FMJ RN. I compared the information with data for th 375 H&H in several reloading manuals and found the 375 Ruger to run slightly less on powder charges across the board.

If anyone needs this data let me know and I will be glad to forward.

And thanks for all of the input on your posts.

SD Shooter

BE SHURE TO READ THE DISCLAIMER ON THAT INFO BEFORE YOU SPREAD IT ARROUND
Been there & done that!!

The Hornady info looks good. I guess it should, they developed the case with Ruger.

I'm supposed to pick up my rifle next Monday, maybe today, so I'm ready to load a few slugs.

Anyone know what the trimmed length should be?

Should I use magnum primers?

Thanks,

Grizzly

Here's some data...

http://www.gunblast.com/Ruger-Hawkeye375.htm

http://www.nosler.com/index.php?p=15&b=375%20Cal&s=346

The file came as an Adobe pdf. It won't let me copy it or insert. I will need to copy it over before I can post it. Will try to get to that tonight.

SD Shooter

I also emailed Hornady without word yet on the load data. My set of Hornady dies was also without load data.

Thanks to you folks and all the links posted. I think I'm ready to start AND my new rifle is due today - I'll pick up after work.

The case length is 2.494" so the trim length is probably 2.484" using the old formula of shortening by 1/100". Right?

Check out the latest issue of Shooting Times magazine. I'm pretty sure there's some RL info on the .375 Ruger.

quote:

Originally posted by Grizzly Albert:
The case length is 2.494" so the trim length is probably 2.484" using the old formula of shortening by 1/100". Right?

If you mean the .375 Ruger:

Max brass length is 2.580"
Trim to: 2.570"
You got the minus .010" part right, of course.

The "specified" max COL is 3.340".

Thanks RIP. I must have read the diagram wrong and big time too.

Frustration is the gun shop telling you your Ruger Alaskan won't be in till Wednesday. Crud.

I've said it before and I'll say it again, Mobile has got to be biggest ballistic backwater in the world.

Thanks to all. I'm ready go.
Sorry I hijacked your post, SD.
Here's my new rifle with the Alaskan tundra in the background...

Guys,

The dies have arrived, the reamer is on its way, a new Barrel is being sourced (most probably an S&L).

Now all I need is the Load data,

Has anybody load data with Vithavouri or Norma powders ?

Got the reamer today, just waiting for the brass and barrel, could say we are half way.

quote:

Originally posted by wrongtarget:
Here's some data...

http://www.gunblast.com/Ruger-Hawkeye375.htm

http://www.nosler.com/index.php?p=15&b=375%20Cal&s=346

Bullet Powder Charge OAL Velocity
Hornady 225 SP H414 90 3.41" 3068
Hornady 225 SP H4350 86 3.41" 2938
Hornady 225 SP H4350 88 3.41" 3019
Hornady 225 SP H4350 89.7 3.41" 3100
Hornady 270 SP H4350 85 3.413" 2783
Hornady 270 SP H4350 86 3.413" 2828
Hornady 270 SP H4350 87 3.413" 2875
Hornady 300 FMJ H4350 84.7 3.349" 2782
Barnes 210X Varget 76 3.297" 2965
Barnes 210X Varget 78 3.297" 3029
Barnes 210X H414 88 3.346" 3085
Barnes 235 XLC H4350 88.2 3.361" 2940
Barnes 235 XLC H414 88 3.351" 2970
Barnes 270 XLC H414 86.1 3.357" 2975
Barnes 270 TSX H414 86.1 3.331" 2856
Barnes 300 TSX H4350 84.7 3.366" 2757
Sierra 200 JRN H414 87 3.16" 3032
Sierra 200 JRN H414 88.2 3.16" 3055
Sierra 200 JRN Varget 85.2 3.16" 3300
Hornady 270 SP (Factory Load) 2758

Does anyone believe this?????
Hornady 300 FMJ H4350 84.7 3.349" 2782

Vapodog,

Good info. Is it from a reliable source?

Finally got to try out my new rifle. It works fine but the reduced loads I used to break it in weren't very accurate. If I find a good, accurate load, I'll post it.

Thanks,

Grizzly