338-375 Ruger Demon

[rigmaster10]

I have finished my new wildcat 338-375 ruger (Demon). I am wondering if anyone has some good loads they have worked up for thiers. The two I have found that work well are:
CCI mag primer. 93 gr. Vihta Vuori N570. 250gr hornady hpbt. 3120 fps.
CCI mag primer. 90 gr. MRP2. 250gr. hornady hpbt. 3050 fps.

Either way its got the Lapua with the same grain of bullet in a factory load beat.

 

[casagrande]

Hi Rigmaster

Does your 338/375 Ruger have an improved shoulder or is it standard like mine. I am not sure where I am going to put 93 grains of N570 when it arrives. It must be a compressed load

 

[rigmaster10]

The shoulder is not improved. I have had trouble bulging the cases with 90-93 grs. Of n570. I'm thinking of switching to n560 or reaming the throat a bit to seat out a bit. Should fix the problems. But using a smaller case and decimating the 338 lapua mag, Priceless

 

[backwoods83]

Use data from a 340 wby, that's what your duplicating, I want to see your 338x375ruger push a 300 grain berger at 2900fps, a lapua will! Anyway you have virtually the same capacity as the 340wby and the same pressure rating.

 

[rigmaster10]

If the Lapua mag with its giant and ineficient case can be bested bye a case with ten percent less case cap. Lapua mag hot loaded is about 2975 with a 250 gr. bullet the 338/375 Ruger Demon is pushing it to 3130. If I drop to Vihta Vouri N560 or ream the throat out for a longer seat out I could push 3225-3250. Thats impressive. Don't get me Wrong the Lapua mag is impressive. But it was built in the 1980's and the case was not as efficient as modern cases. I wish Lapua would update it. As they are one of the finest in new caliber creations.

 

[backwoods83]

As I said, load them both with 300 grain pills an see which one is more impressive, the lapua isn't bad for a 29 year old cartridge. Use either one of them and try to catch ole roys 338x378 from the 50s!

 

[rigmaster10]

As I said compare case capacity and just the fun of making a wildcat its amazing. Also as I said I wish Lapua would make a new 338 cartridge. As they did with the 6.5x47 which compares with the 300 Win mag. Then I believe I would have a rifle that would compare to my Cheytac. Maybe not. Either way there is alot of potential for the 338 caliber as a whole without having to go to barrel eating over bore.

 

[casagrande]

I took my 338/375 down to the range today with just a few loads. I am using 200 grain GS Custom projectiles in front of 86 grains of ADI 2209. This was the last of 4 loads which produced an average of 3,318fps with no signs of pressure. I can't weight to try the next loads.

 

[Gene R.]

Could a guy get comparision photo of the "lil Demon" to say a wsm or something You have got my attention with said fps and wieghts And the rifle togun)What is the parent case Ruger based 375 on?
Seen a tv show the other day that the fella KO'd a coastal Br. bear with the factory 375. Bang! Flop! Smiles!

Thanks,
Gene

 

[martinabbi]

I think it would be a great wildcat. I'm currently getting a 300-375 Ruger done. Great case design, especially for wildcating - not to sure about brass quality though as Hornady is the only option.

 

[AZShooter]

Rigmaster10:

What length barrel are you using? Your reported velocities are very high.

I did an extensive search and only the 338/378 Weatherby in some loading manuals list 250 gr bullets moving faster than 3100 fps. I realize the load data is usually done with relatively short barrels but your results seem off the charts.

The 338/375 Ruger is very similar to the 330 Dakota. Dakota lists their 250 gr bullet at 2900 fps. Every loading manual I found lists Dakota loads generally running in the 2700-2800 fps range.

Sure a 30-32" barrel can add some velocity but 3120 fps????

 

[backwoods83]

Like stated earlier I just don't see it either, sure the 375ruger is a good design for a shorter cartridge with a decent capacity, but necked down to 30 or 338 it still comes up short of the 300 and 340 wbys they are at 101 and 101.8 h2o capacity, the design of yours depending on reamer design is 95-97grns h2o and both cases are rated 65k psi, a 340wby will do right at 3000fps with a 250 grain bullet and the double radious shoulder is superior to the rugers shoulder design and your getting 120fps more, are you using a 38" barrel with your compressed load of N570?

 

[rigmaster10]

Ghats fast. Let me know how it works out I'm very curious

 

[rigmaster10]

29" lawton barrel. Backwoods