Home Forums Hunting & Shooting Custom Rifles & Wildcats 7mm-375 Ruger?

Grasshopper---I thought it would have more case capacity than the 7STW.........no?

SC---never said I didn't like the WSM, just said I'm done tinkerin' with it. We are talking much bigger case capacity here...

This would be a a cool wildcat,but I'd rather wait to see what other versions of this case Ruger will make before I spend the money for a wildcat.

Till then I'd rather spend the money and time hunting than on custom reamers,dies,etc.But I'll most likely get on board when ruger starts neckimg the case down to smaller calibers.

I can say that I think the Dakota factory rounds are pretty cool,I have a 330 Dakota and it's a fine round. The Ruger series would be a far less costly way for people to have an unbelted magnum case that fits in a 30-06 size action and gives performance in excess of what we generally see with 30-06 length belted magnums.

Britt

John Barsness in his article on the 375 Ruger (see extractbelow, taken from Big Bores forum) says the case capacity is 6% larger than the 375 H&H. That would make the 375 Ruger case a tad larger than mid way between the 375 H&H (and 300 Winchester) and the 375 Wby, 8mm Rem, etc.

The 2.5� Dakota calibres have about the same case capacity as the 300 Wby but the head diameter is based on 404 Jeffery, about .545. The Ruger is about .532, that is, the same diameter as the belt on belted magnums such as 7mm Rem, 300 Win etc.

Personally, I think the 7mm/375 Ruger would be much better if and when Ruger bring out a 300 Ruger as necking from 375 to 7mm is a long way.

by John Barsness
Rifle Magazine, May-June 2007 #231

Case capacity of an unfired case with a 300-grain Hornady round nose seated to the cannelure was 87.6 grains of water, while a new Winchester .375 H&H case with the same bullet seated held 82.7 grains, exactly the 6 percent increase in case capacity that Hornady claims.

I'm in a state of confusion, now. Every time I read or hear anything, a different case capacity is quoted.........

You need to be more like me, who gives a [bleep].............

Case capacity is a very inexact science. It will vary depending on who made the brass and what batch it came from within a manufacturer.

Even identical brass will have different volumetric capacities once it is fired, dependant upon chamber dimensions.


I do not believe a 30-375 Ruger will do a darned thing that can't be done with a 300 Wea, nor much that can't be done with a 300 Win mag.

That does not stop me from wanting one for the same reason I wanted a 264, and a 22-243AI, and a 7STW, and a 260 Rem. The latter two before anybody but nuts like the ones (me included)who frequent these forums had ever heard of them. I just think the 375 Ruger case design is great design and it should have been the design of choice when the 7 Rem mag and 300 Win mag were designed.

Not that I have anything against belts on my magnum, or fins on my Cadillac, for that matter. They are equally useful.

2MG,

Man, if you have an itch for a 7mm-375 Ruger, by all means have one built. That is what this rifle looney business is all about. You will have a great conversation piece where ever you carry it. Working up loads will be fun since it is not in any of the books. But it is close enough to the 7STW that you have good starting points with a bunch of different components.

And most of us will be very anxious to hear how your loads work out and what kind of real world performance you can achieve.

I thought about the same thing when I first heard about the 375 ruger. To be honest, I don't really see the point of the 375 ruger. The concept of designing a case solely for the purpose of equaling the 375 H&H while using a standard length action in order to make it cheaper is a bit lost on me. Folks that need something the size of the 375 H&H generally have a lot of money invested in a hunt anyways, so saving a few hundred bucks by buying the cheaper ruger isn't really going to factor into their decision making. I just don't see the market for the 375 ruger. However, I do see the potential of the case for wildcatters. My first thought went to a 7mm version on this case. I'm not sure it'll have quite the capacity of the 7mm stw, but it'll be close. It gets rid of the belt that so many people hate (I don't), and it'll fit in a standard size action. I've had both the 7mm stw and 7mm rem mag and the stw is good for about 250 fps over the rem mag. 140 gr bullets were no problem out of the stw at 3450-3500 fps. I'd imagine the 7mm-375 ruger should easily give you 3400 fps with 140 gr bullets, plenty for me. A huge advantage that I can see is that the reamer for a 7mm-375 should easily clean up a standard 7mm rem mag chamber and it shouldn't require any feeding modifications, so all it would really take to convert a 7mm rem mag to the new wildcat would be running a reamer into the chamber.

They all ready have a 30-375 Ruger. It was done about 100 years ago and called a 30 Newton

True.I can't imagine the 7mm/375 Ruger would be anything other than a good 7mm magnum;like a Dakota,or so similar you'd never notice the difference.Both have a jump on the 7RM and the 7WSM in case capacity and velocity...possibly not as fast as an STW,but with a 160 at 3200,a 140 at 3375,and a 120 at 3550(24" tube)...you will never notice.

Reminds me of a 7mm Dakota.

Without their brass price.

I think it makes alot of sense for a 2 1/2" case in a properly throated reamer and running the big slugs.

Related costs, not with standing.....

resurrection?

.......................The reason you don`t see the need for the 375 Ruger is that you haven`t thought outside the marketing box. Instead of just the cartridge itself, look at the 375 Ruger rifles too. Why are you at a loss in figuring out, that bringing a lesser expensive cartridge/rifle combo to the marketplace, might just allow those who want a 375, to better afford one? Whether one can afford $2k, $5K or only less than $1K, the 375 Ruger nevertheless, offers a lesser expensive alternative, which the cost differences in some cases, can be applied towards the expense of a hunt including a scope. You may not see the marketing need for the 375 Ruger, but to this date, Hornady, Ruger and the shooting public would disagree with your "no marketing need" assessment.

Here are a few points and reasons why the 375 Ruger has been so successful to the present, is currently successful, and will continue to be.

Rifle price!....Free marketing principles dictate most of the time, that when you have a good product that is always in demand, such as the 375 caliber always is, and then sell the product to the public at a very reasonable price, you`re going to sell a bunch of units. By the amount of 375 Ruger rifle sales to date, that has been proven and cannot be disputed.

Alternative case design!....Although there is no difference in game killing capability between the H&H and the 375 Ruger, the Ruger round nevertheless, has the greater powder capacity. This in turn allowed Ruger to develop rifles, chambering the Ruger round into rifles that are shorter, handier, easier to manuver, while duplicating from a 20" barrel, 24" to 25" 375 H&H ballistics. There`s no marketing value or need to do that??? Well! So far by the shooting public`s response, it would overwhelmingly seem that the shooting public has yet to reject the Hornady and Ruger vision!! If one can do the same things on the same game, and do so with the same ballistic performance from a shorter, in some cases a lighter rifle, as opposed to one that`s 44.5" to 46.5" long and heavier in some cases, then why not?

Hornady and Ruger saw the need and the factual results speak for themselves!

And because of the 375 Ruger`s success, we just may see a 7mm, 300, 338, 350/375 Ruger from Hornady and Ruger in the future as additional choices.

Gosh I hope you are right!

i am ready to build one on a 700 remington to see how it will feed without a belt, hucking a 180 Berger, and not using an extended Wyatts magazine box which I have done with the 7stw and the 180 berger,,, I didnt want to neck down 375 to 7mm, and deal with inside neck reaming or outside turning,,hoping for a smaller ruger caliber like a 7mm or 30,,, seems the necks would get thick, I neck 376 Steyr down to 8mm, a bullet just touches the inside of the neck on a fired case....

Hello

Im new to this forum but i love my 375/7mm ruger ! with a 140 nosler i get 3700 fps !!! Ruger markII action 28" shilen barrel. I biuld a new gun every year and i want to biuld a 7mm STW but couldn't find a ruger action so i started playing around with cases and ended up with a 375 ruger case !

Thanks Canyon Cruiser

A good startin point is the max dakota data !

canyon cruiser, what is the capacity of the 7mm/375 Ruger compared to the Dakota case.....Also curious how you have come by your data...sounds like a hell of a cartridge!

3700 fps from the 7/375 Ruger even from a 28" barrel seems hot.

I had a 26" 7 RUM a while back and the absolute max load with a moly coated 140 nos bt was 3665 fps.

The case capacity of the 7/375 Ruger is less than the 7 RUM, very close to the STW.

I happen to have some virgin 375 Ruger brass, some fired/fl sized 7 RUM brass and fired unsized 7 STW brass on hand. I filled each case with water:

375 Ruger 100.9 grains
7 STW 100.6 grains
7 RUM 114.8 grains.

A 7/375 Ruger should hold less than a full size 375 Ruger but I don't have the means to neck one down.


The 375 Ruger has 12.1% less case capacity than the 7 RUM. Using JB's 1/4th formula the non necked down 375 Ruger case would yield 4% less velocity compared to the 7 RUM. .96% of 3665 fps is 3518 fps. Add 50 fps or so for the longer barrel and that makes 3568 fps.

I won't deny you got 3700 fps but it seems to me you are working with some very high pressures.

If anyone can produce the actual water capacity of the 7/375 Ruger case I'd like to hear about it.

for conversation

the 7STW via QL...

83.5 gr RE 25 with a 140 loaded to 3.65" COAL gives 3422 FPS from a 28" bbl @ 66758 PSI (slightly OVER max pressure)