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Wildcats on a .375 Ruger case?

 
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  #1  
Old 06-20-2011, 12:29 AM
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Wildcats on a .375 Ruger case?

Just wondering if anyone has built a wildcat cartridge based on the .375 Ruger case?
If so what? .338? 7mm??? .30???
What performance are you getting?
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  #2  
Old 06-20-2011, 06:43 AM
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Re: Wildcats on a .375 Ruger case?

I have not built any wildcats off this cartridge but have seriously thought of building a 338 and 7mm often. I even have two boxes of 375 Ruger brass.

I think if you type in 7mm/375 Ruger or 338/375 Ruger you will find that others have made these every since Ruger/Hornady announced the 375. Rick Bin on 24 hr campfire made the 338 version which he called the 375 Campfire.

If you look at the data on the Dakota line of cartridges it will give you an idea of the performance of the necked down 375 Ruger. The advantage IMO lies with the 375 Ruger as the parent case. Besides a "normal" sized case head the Ruger case is far less expensive than Dakota brass.

Many of us were disappointed to find Hornady and Ruger did neck down the 375 case AFTER they shortened from 2.5" to 2" to make the 338 RCM and 30 RCM. I have a heavy and light 338 RCM and they perform magnificently. I would have preferred to have seen the full length case necked down instead. Every once and a while I hear rumours that Hornady is working on a few necked down full length 375 Ruger cases but so far have seen nothing.

Any of us can build one of these wildcats all it takes is some cash. Custom reamer and custom dies will be pricey. after that it would be easy. The cases will fit in most standard length actions with no modifications.
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Old 06-20-2011, 06:51 AM
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Re: Wildcats on a .375 Ruger case?

That's interesting.
Can you make .338 Dakota brass from .375 Ruger brass?
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Old 06-20-2011, 09:34 AM
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Re: Wildcats on a .375 Ruger case?

Gunwerks calls the 7mm version of this wildcat the 7mm LRM. Here is another thread about the 7mm. Quite few guys have done a .338 as well.


7mm/375 ruger build

Last edited by brentc; 06-20-2011 at 09:54 AM.
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Old 06-23-2011, 09:14 PM
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Re: Wildcats on a .375 Ruger case?

No cannot make Dakota case from 375 Ruger case.
Casehead is larger on Dakota.
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Old 06-23-2011, 09:53 PM
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Re: Wildcats on a .375 Ruger case?

4D makes a reamer that a smith can rent for a 30/375 Ruger

4-D Products Rentals



you gain about 6 or 7 grains over the 300 win mag but in an unbelted case. I have been planning one and have necked down a 375 Ruger case just to make sure I can get it going to get a fire formed case to send off to have a die made. I talked with Hornady and one of their techs shoot one so he clued me in on the process. It is too much of a step down to go from 375 to 308 in one step. So this is the process I worked out:

1. Size the neck as small as possible with a 375 Ruger Full Length die with the expander removed
2. Use a 338RCM Full length die (a neck die won't work because the forcing cone will crumple the neck). A Full length die has a more gradual forcing cone evidently
3. Use a 300 RCM Neck Sizer to size the neck down to 308

Here is a comparison between the 300 win mag, 30/375 Ruger and 375 Ruger cases



My plan is to send off a 300 win mag rifle and have the chamber reamed out. The smith may have to set it back a couple of threads but should not have to refinish the gun so it should be economical. Just haven't gotten around to it yet.

My goal is to shoot a 200 gr 308 bullet at an honest 3000 fps without a belt and without a muzzle brake. And just because it will be different and fun.
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  #7  
Old 06-27-2011, 05:54 PM
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Re: Wildcats on a .375 Ruger case?

So far my 7mm-375 Ruger AKA 7LRM is achieving 3160fps ave. with 73.6grs. of H1000, 215m, and a 180VLD with a coal of 3.456". The last 3 shot group measured about .4" at 200yds. I'm still fireforming the brass I got from Gunwerks and will probably end up at around 74grs and 3175 same accuracy based on the trend with this rifle.
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