Ladies and Gentlemen:

Has anyone made up a .458 caliber on the new 375 Ruger case? Is it possible, and if so, are there any reamer prints that you are aware of?

Thank you.

Sincerely,

Chris Bemis

https://forums.accuratereloading.com/eve/forums/a/tpc/f/...=871109356#871109356

i like the idea of the 400 ruger

the ruger case will go to .423, and have reasonable headspace. .458 jsut won't work

quote:

Originally posted by jeffeosso:
the ruger case will go to .423, and have reasonable headspace. .458 jsut won't work

What about this photo from RIP's thread?


Does the pic lie? It looks like more of a shoulder than the .470AR?

Is that a 458 on the right side? If so it looks as if it has about the same headspacing as a 400 whelen. I have not read anything bad about that cartridge chambering. I think i will check with my local smith about fitting a 458 barrel i have sitting around and fitting it to my P17.

it would be.038" total headspace

the 458 AR would have 15gr more capacity

bent, it's roughly the same headspace as the 470 ....

a m1917 or p-14 (america hasn't used pattern X for oh 230 years IS 15 mins from being a lott

the 425 w.r. bullet would be the biggest to go with or the 458 a.r. is the best bang per buck

Is there anything out there that will fit a standard length and still have more ump than the 458 that does not have a belt?

I forgot to ask! The 458 a.r.! Are you talking about the cartridge designed for the AR15 SOCOM? If not please inform me about this cartridge, I would be interested.

do a search...

the 458 ar is a shortened rum case to fit a std action that is larger in capacity than the 458 lott.

https://forums.accuratereloading.com/eve/forums/a/tpc/f/4711043/m/769108843

Check the last couple pages.
2374 out of a 23" barrel with hornady 500gr SPRN

load to 3.35"
416, 458, 470, and 500 Accurate Reloading
Loads are on ammoguide as well.

this is a shortened, improved rum...
jeffe

I have a 416 and 404 on the ruger case. I don't think I would want to go to a 458 cal. as the shoulder may be a bit less than it should be, but it doesn't take much of a shoulder to get by. It would be an interesting project. Maybe someday I'll take a closer look.

Come to think of it the 460 G&A was a .404 necked up and an excellent round, and the 375 Ruger is on the 404 case, so why wouldn't a .458 work?????

Ray,

How is that 416 working out?? I was thinking about doing that one. I thought about waiting till Ruger did it but I am 43 and dont think I have that much time.

quote:

Originally posted by Atkinson:

Come to think of it the 460 G&A was a .404 necked up and an excellent round, and the 375 Ruger is on the 404 case, so why wouldn't a .458 work?????

Atkinson - are you sure, I thought the Jeffery people took Remington to court originally because they used the Jeffery case (RUM), or was it Winchester WSM, surely Ruger wouldn't make that mistake

If it is based on the Jefferey case, then in 458 it would become an UNimproved 458 AR

regards
S&F

quote:

Originally posted by Atkinson:
Come to think of it the 460 G&A was a .404 necked up and an excellent round, and the 375 Ruger is on the 404 case, so why wouldn't a .458 work?????

because the ruger is not based off the 404 case.

nominal largest dimensions
rum/wsm .550
404 .545
ruger .532

actuals
rum .547
404 .541
ruger .529

the ruger is an all new case, unique as one can get today

the 458AR would have to be beaten and deformed to go into the 460 ga or ga short chambers, with a large hammer, and the brass shavings coming out of the back might be a clue as to why not.... it won't go into a lott/winmag chamber.. just too big

Thanyou Jeffe

I thought so, Just didn't know quite how to say it

I was always under the impression the new Ruger brass has NO parent case. This is a brand new animal folks

The only thing it has in common with any case is it head size (originally I heard it was going to have different head size dimensions as well)

regards
S&F

Monty,
I like the 416/375 Ruger a lot and its destined to be a factory round at some point...I am now custom stocking it...then I will probably sell it.

I had the 404/.375 Ruger in barreled action and in an old junk stock, and liked it as well, except yesterday some guy came by and bought it...

Guess i will make another 404, I like that idea, but its not as practical as the .416.

quote:

Originally posted by Atkinson:
Monty,
I like the 416/375 Ruger a lot and its destined to be a factory round at some point...I am now custom stocking it...then I will probably sell it.

I had the 404/.375 Ruger in barreled action and in an old junk stock, and liked it as well, except yesterday some guy came by and bought it...

Guess i will make another 404, I like that idea, but its not as practical as the .416.

Deep down inside aren't we all "gun-whores"?

quote:

Originally posted by boom stick:
https://forums.accuratereloading.com/eve/forums/a/tpc/f/...=871109356#871109356

i like the idea of the 400 ruger

Now that is interesting!

Ruger's parent is 9.3x64.

quote:

Originally posted by D99:
Ruger's parent is 9.3x64.

No, it's not.
the 376 steyr is the x64 .. the x64 has about a .507 base.

the ruger has a .532 base.

Why do folks have such a hard tiume understanding it's a perfectly simple idea... "the hh case belt is .532, why not make a case that is too, but no belt"

anyway, the 416, 458, and 470 AR cases are larger in capacity than the ruger, and from RUM brass...

Thanks, I didn't know that. I was lead to beleive it was a 9.3x634.

d99
sorry if that came over a little rough.. I had a discussion with a gent that wasn't very polite in telling me that rugers were made from 8x68s (same thing)... which was also smaller than .532 base. (btw, his was inaccurate)

you COULD, using hydro presses, crush 404 or rum cases down to a subcapacity 375 ruger case.. it's a unique case

jeffe,

two things:

1. Can you PM me the loads your friend developed for his 577NE 3" with the 1010gr NEI cast bullet? I want to start loading for it this week.

2. How many yankee dollars you gotta have for a set of 458 AR dies and a rechamber job? Everything, the action, etc? I am thinking about digging a tang safety Ruger out at the next gunshow, if it can be done cheaper than a 450 Rigby. Where are the two at as far as powder capacity and velocity?

Thanks Man, want to bunk me at your place a day if I come down for the shoot?

Rich
DRSS
Knowledge not shared is knowledge lost...

Rich,
I'll call you tomorrow!
jeffe

I suppose when its all said and done and I sell the .416 Ruger I am building, I will do another 404 Ruger and that will be my personal gun, well hopefully, unless someone just has to have it....

Why am I such a gun whore..I think I just like building them, its a nice hobby in the Idaho winters...

Everytime I go rope in zero weather I think to myself I should be in my warm shop building a rifle, oh well, I guess I'm blessed with two hobbies, that ain't all bad, and all that exercise keeps my blood suger in control.

Yes,
That is a .458/.375 Ruger on the right.
It has more shoulder than the 400 Whelen, more shoulder than the 10.75x68mm Mauser.

I would like to build one on a Ruger Mark II or Hawkeye, as soon as the .395 craze sweeping the world has run its course.

quote:

Originally posted by RIP:

It has more shoulder than the 400 Whelen, more shoulder than the 10.75x68mm Mauser.

That is all we need to know! It should be a raging success, if ammo was available...

Jeffe, you have the 500 AR going from a .589" casehead to a .510" bullet; why not have a .529" casehead going to .458" It's all of .008" bigger.
That's a .480" neck, a taper to .510 at 2.2", etc. It would work. I'd say it's that side of maximum, btu a good smith with custom reamers, yeah. It would work.

the 458 AR is from cheaper and more available brass, and the 470 works on the UM cases... .550 .. so, if you take .550-.532, you have .018, which is .001 "more" potential shoulder than the 470 AR ..

Seriously, though, the ONLY xRuger wildcat *I* want is a 338x375 Ruger ... The 416 AR has more case, the 458 the same, and you can't do a .470 on one ...

Now, a 338 ruger, with a 26deg shoulder would be about perfect.

jeffe

Sure, but isn't the "majic" about the Ruger case that it feeds straight from rifles chambered for belted mags?
The Dakotas, etc are great rounds no doubt, but if a fella had a 375 Ruger to rebarrel and a prediliction for tinkering, it would be worth considering at least.

I'd like to mock up three rounds of .458/.375R.
Does anyone have a few empty .375R cases I
could buy? Once fired would be ideal.

Thanks

RG