I found out the other day that 105 grains of H-1000 and a 300 grain Nosler partition would shoot the same point of impact as the 235 gn. Speer with 100.5 grains of N-160.
The temp. was 40 to 45 degrees.
Another load that some of you may be interested in is..
A 285 grain Speer G.S. and 91 grains of XMR 4350 shoots the same point of impact as 90 grains XMR 4350 and a 300 grain Barnes X solid. Please reduce these loads and work up carefully. My 375 Ultra LSS just started to show pressure signs with 105 grains of H-1000 back in the summer temp. 90 to 95. Mine has a 1 in 12" twist and I had to re-bed the action and float the barrel. However I am well pleased with it now. I would be interested to know if these loads peform the same for others.

I agree the 375 RUM has a lot going for it, but I have a 375 H&H and it has served me as well as any gun I own, so I will never own a RUM I don't suppose...

You really don't need more gun for the hunting I use my 375 H&H for and more velocity is not what I am after if I need more gun..Im not a velocity freak, it tears up perfectly good bullets!
If I want more than a 375 I use a 404 or 416, I increase the cross section not the speed...but I know the high speed 375s will kill very well indeed with a proper bullet, and they are bloody flat shooting.

If I did not have a H&H then I would entertain the 375 RUM, as it is a nice round, no belt and one could load it down to better velocities such as a 300 gr. at 2500 FPS and have very low pressure..All that is very good, its got a lot going for it but I don't think it will survive in the long run, the H&H has a 100 year headstart, and worst of all if it slows down in sales, then historically Remington will run out from under you in a heartbeat.

If I had a 375 H&H I would have no reason to have bought the 375 RUM. So I chose the RUM This is my first big bore other than the 45-70 and 450 Marlin both of which would not be my choice of a proper cal. to carry across the pond on a hunt. I am sure I would have just been just as satisified with the 375 H&H. I can load it down or load it right with the 375H&H. Or somr day (maby)but probley not. I might just get to go across the pond and hunt where I bought it to hunt with. I am not a velocity freek eather. But I figured the new tooling of the 375 RUM I might get lucky and get a good accurate rifle. I have owned many 700 Remingtons and have never saw one that I could not improve the accuracry on wheather it shot m.o.a. out of the box or not. And for some one on a budjet I have my rifle and can dream on about the trip that might happen. Without it the dreams it seams could not go on.

The .375 RUM 700 LSS is very accurate and got 2800 fps with factory Remington 300 grain Swift A-Frame loads in the 26" barrel.

I also had a .375 H&H Winchester M70 barrel shortened to 23" by whacking off the threads and rethreading and chambering for the CZ 550 Magnum action, then placed in a custom walnut stock. This 23" barrel produced about 2775 fps with the same factory ammo in the custom chamber, and no pressure signs.

The long monometal bullets of heavy weight should work well in the .375 RUM, with its bit greater case capacity.

I need to see what the Walterhog by Bridger can do in the .375 RUM. Very close to Saeed's .375/404, and it wasn't too shabby in the effectiveness department on buffalo up close, and hyenas at 300 yards.

Surely it is the long range varmint potential of the .375 RUM that would make it outshine the .375 H&H, but it also puts more hurt on the brutes up close when a tough bullet is used.

Thanks for the load data, y'all. I just got finished with the .375 Weatherby for a Reloading Page of Saeed's tabulation, and he has agreed to post it.

We need someone to cook up a .375 RUM Reloading Page, so I will be working on that one next unless anyone here wants to beat me to it. It would be interesting to put Saeed's .375/404 loads into the .375 RUM for comparison of a factory rifle in .375 RUM (700 LSS) to Saeed's custom .375/404.

May the J-Lock RIP.

Glad to see this thread is still alive.
I've been in .375 HELL for a long time.

I may have stumbled across the final idea to get my .375, and I'm 99.44% sure it's going to be the Remington 700 LSS in .375 RUM!
I can't seem to break away from the Remington 700 for this choice, no matter what I do.
This is the reason I've been doing my homework and posting here and there and everywhere until I get enough information that the idea takes its final form.

My bouncing around on this decision has kept me entertained for quite some time, though.
I almost went with the Browning A-Bolt II w/BOSS in .375 H&H...but, it was kind of 'too nice' and was neither fish nor foul with the mag setup and the safety wasn't where I'd be used to it.
THEN, reasoning that this should be a very special rifle, I almost went with the SAKO 75 Stainless, which would indeed be a very good choice, but the mounting system and availability of aftermarket mounts SUCKS. SUKKO. Nope.
At this point I almost gave up and returned to my '.375 TACTICAL' idea in the Remington 700 when it occurred to me that the 700 LSS could fill the bill quite nicely for a reasonable sum and I could even use one of my old stocks from a 1989 700 'AS' to put the stainless action into! (I'm not much for the broomstick look of laminated stocks, sorry... )

OK. NOW we're talkin'.
I'll have a Remington 700 Stainless in .375 ULTRA with a clean 26" bbl. put into a synthetic stock that has a slight 'greenish grey' tinge to it, and the required 'TACTICAL' scope/mounting system readily available.
(All I have to do is decide how to switch around the ones I've got and what other ones I need to make it all work...)
There are a couple of things to do that will enhance this gun's performance for ME. It's not a DGR for Africa and won't see Alaska any time soon, either. For now, it just has to 'be there' for me.

Add to that a good reason to get some reloading equipment for the .375 RUM and my 7mm Rem.Mag., and I don't know what would please me more than the first time I pull the trigger on THE .375.

I am very satisfied with this decision.
I'm gonna have fun falling asleep tonight counting 'gun sheep'!!!

BusMaster007

For whatever it is worth to you I have also been through 375 Hell for a while!! In my cases the "hell" has has been ended with the order of a pair of upgraded Mark V 378s. Tbe path I took maybe of some interest to you.

Ever since the Ultras came out I have thought they are about the best thing around and especially the 338 and 375 Ultras. In the opposition corner to the pair of 378s was a 375 Ultra in the African Big Game, a 375 Ultra in the African Plains and a 375 Ultra in the Laminated Stainless.

The Remingtons in 375 Ultra probably would have won the day except for two things, neither of which I think will apply to you.

Firstly, a great deal of my past shooting life has been with rifles being rebarreled, Jewell triggers being fitted etc and the never ending chase for accuracy. I have owned several Wby rifles before and heaps of Rem 700s and Wby rifles for whatever reason don't seem to take me down that path but the Rem 700 does.

Secondly, although I know it works I just can't stop from breaking out in hives everytime I see the rivoted in Rem extractor on the magnum bolt face and this would have been doubly so with the ABG and APR rifles as they are quite expensive. Also, I have a mild break out in hives with the detachable recoil lug on an expensive rifle.

The other reason I went 378s is that those big Wbys seem to take you out of the main game...in other words there is not really many other options for a calibre like the 378.

So if was not for the rifles and some attitude issues I would have gone 375 Ultra.

As a side note I bailed out on the 375 H&H for a couple of reasons. I wanted to have a couple of above average rifles and the 375 H&H as soon as you do that (at least in my mind) it opens the door to Mausers and M70s with quarter rib sights and so on and etc. which was grief I wanted to avoid. Also I have had so many 375 H&Hs and been directly involved with others 375 H&H.

Lastly, in the couple of years I have become very big on loading the big case back to get a set of target ballistics and the bottom line is that both the 375 Ultra and the 378 will do top end 375 H&H loads with their starting loads.

Mike

Mike,

You're right about some of those concerns not applying to me.
I won't have to justify anything here, I'll only mention that for the Remington 700 shooter, there are certain things that can be done to alleviate 'problems', real or imagined, with the 700 platform.

'Washer' style recoil lugs can be drilled and pinned.
The safety can be made to do all manner of things, like the original, only with a bolt lock, or, god forbid, like a winchester...
The extractor and ejector? I don't know about that, but, there's an interesting version of it done by Jarrett.
OR, one can leave things as the factory built them, and they'll probably work just fine!

First, not to get on a PF vs. CRF flame-war, there is an article by Ross Seyfried that took away most any concern I had with the extractor/ejector/feeding or what-have-you with the Remington 700:
http://www.riflemagazine.com/magazine/index.cfm?magid=9
A Professional's Rifle.
He used a 700 in .416 Rem. and did some things to it to make it work for him.
It was ugly, but it worked, and he trusted it.
One thing in the article about the extractor was that it either failed quickly or worked forever, if I remember it right. I've got to dig out the magazine from my 'stack'.
Anyway, for what I'll be doing, which is mostly just having a 'Bob Bitchin' .375', it'll work for me, and I appreciate your recognizing that fact.
Something else I remember reading on the internet on the African Hunter site, or whatever it's called, is that the Remingtons and Weatherbys were the LEAST favored rifle by the guys who test the PH's and Guides.
Brother, they got bashed big time!
I'd have to go find the link, but it's out there in cyberspace waiting for us MarkV and 700 fans to read and bleed about!
I kind of feel bad about forsaking the .375 H&H for the .375 ULTRA, but, hey, I'm only 47 and this is the 21st Century, so, I'm gonna give it a try.

I'll make a hideous confession here.
I do NOT own any of the following -

1. Winchester Model 70
2. 1911 pistol
3. S&W revolover

If I want to go 'nostalgia', I'll get one of each of those in .375 H&H; .45 ACP and .357, respectively.

This is going to be FUN to make this gun, and that's what it's all about.
I'm going new school here this time, baby!

BusMaster007


The conclusion I came to many years ago is that all the rifles work about the same. How a problem is reported often depends very much on the bias of the reporter.

But there are some things that are just annoying and it is different things to different people. For example on these 378s they have been ordered with the all steel bottom metal option which adds about $300US to each rifle. Now I already know they will make no difference but I just like all steel if I can have it.

By the way, I had two 300 Winchesters in those stainless Rem 700s with the crean and gray laminated stocks. I liked the look of them a whole lot.

Mike

Hey Mike 375.

I'm not really a Weatherby rifle fan but I saw the most beautiful factory rifle I have ever seen last week and it was a Weatherby!
The rifle was a Safari grade custom in 416 Wby.

It made me want one until I found out what it cost!
Way to expensive for a safe queen (I am hard on my hunting guns) but damn it was nice!
Is that what your 378 is going to look like?
I sure love that gun!!!

Jamie

Jamie

No. They will look like Wby Deluxes with upgraded wood and with the all steel bottom metal.

Mike

In fairness the hot slugs you are using might be lighter than full bore 00 buck, but you are definitely in the ball park!!

A 375 Ultra us just something you need to make friends with...like a mean dog. You just can't get macho and think you can dominate it...it will bite you and you will flinch. Use recoil protection and pay attention to shooting position and it will be your friend.

Also, if you want to shoot the very big loads, taking it up to 12 pounds is not a bad idea as it will work hard on your optics even if the recoil is tolerable to you. Some other folks know better than I what will stand up to the snap of a 378...probably a Leopold...

A nine pound scoped and loaded 375 RUM M700 LSS is a gentle lamb of a rifle with which you can place your 300 grainers with MV of 2800 fps unerringly out to 300 yards without fuss. That is the reason for using a 375 RUM instead of something bigger.

10% physical, 90% mental is the way recoil tolerance shakes out. Get a grip and concentrate. Become one with the rifle. Easy as falling off a log in the river. Go ahead and get your feet wet.

recoil is definatly abrupt in my ss syn 700. 94 grain imr 4350 and 270 failsafes.

In twelve rounds it had ripped the skin off my trigger finger through my gloves.

I am planning on putting a F990 pachmeyer on it.

Do you guys think the remington upgrade r3 recoil pad would make much of a difference? ( besides just adding about a pound to the weight).

The R3 pad is in the plans.

What I intend to do is remove the 'broomstick/laminated' stock and use it on my matte finished Remington 700 in 7mm Rem.Mag. with the Leupold Vari-X III 4.5-14x40 matte scope.

That would be a nice combo.

It would also allow me to use the R3 pad on the synthetic stock!



I have the original 1989 'AS' Aralon Synthetic stock from the 7mm, which has a nice 'greenish grey' hue to it, and put that on the .375 RUM/stainless, with a matte finish scope/rings/base setup. Later, I may have the stainless refinished to matte black. Remember, I just LOVE that 'tactical' look! Silly? Maybe.



The scope has me pondering, though.

I'm not going anywhere with this gun for a long time, if ever. It's mainly just to 'have one' at this point.

EYE RELIEF is my major concern.

Therefore, the Leupold brand is probably going to be residing atop this unit.

I'd originally planned on using the 6X42 M8, maybe the one with the Target Knobs and A/O... with my old Redfield Tracker 6X42 as the back-up in QD type mounts.

The Leupold choice can be modified, if I go without the A/O, by using Stoney Point target turrets to achieve the look I mentioned. Yes, I'm out of my mind.



The power would be the same, but, the back-up scope would have a little less eye-relief.

I KNOW what you guys are thinking - 6X is TOO MUCH, but, I'll need to have something on there that will match the back-up scope in power and the 6X42 Leupold is priced reasonably at around $300.00 or so.



FIXED POWER would seem to be able to withstand the vigorous recoil better than the variables, I would think.

I was going to use either a NIKON 3.3-10x44 A/O or the Leoupold Tactical Vari-X III 3.5-10 on this gun...what do you think of those choices, in a variable?



I won't gain much rifle weight with a bigger scope, only more problems with the scope, I think, on this gun, because of the recoil.



The reason for the 10power upper end was to match the view of my NIKON ATB 10x40 binocs, so whatever I see with those I can see with the scope. That's probably not a necessity, but, I gave it some thought.



So, the recoil is a bit 'abrupt', eh?



I gotta go drive a Bus in the snow, now, so, I'll check back later!

I've really been convinced by this forum thread, now what I'm wondering is: can you make brass from .404 jeffreys cases (non-rebated rim),will it feed?, if so that takes away every drawback apart from kick.

338 Lapua,

I think the 375 Ultra is slightly bigger in diameter than the 404 Jeffery case so cases made from the 404 might show a bit of visible expansion just above the solid head.

I think you will find that the Ultras and WSMs are based on a rimless version of the 348 Winchester case size, not the 404.

Clymer Reamers list the following base diamters:

.5510 300 Ultra and 375 Ultra
.5563 300 WSM
.5540 348 Winchester

.5460 404 Jeffery

While Clymer is known for having errors on their web site I think the above numbers do fit with much of what has been posted on this site.

Hope this helps.

Mike