.338 R.U.M. fans

[Martini25-308]

Not trying to butt in here, but it looks like the target has 84.5 of RL-22 with a Federal primer. Your thread says 74.5. Either way, nice little hole puncher at 200 yds.

I was in picking up some new brass for the 22-250, hadn't looked into this .338 RUM before and saw a box of brass marked .338 RUM so thought I would see what this 6 page thread was all about. Are you sure the Navy doesn't use this against enemy battleships?!?!?

I can't imagine holding that up to my shoulder. Rumlover, I know you have said that the recoil is not that bad,,,,,,,but 90 grs pushing 250 grs at 3000fps has got to pack a punch.

[royinidaho]

Come on in Martini! Your cartridge is a bit small but we'll play with ya.

Rocy Raab, one of the admin guys is a 25-308 user. But I think he has the 25-308 in one hand and the martini in the other

I suppose only you good guys can have them both in the same hand.

Reportin' todays activities. Weather windy and snowy. How windy you say? Enough to push a 222 Rem 40gr Vmax 8" @ 200 with the wind only 15 degrees from the bullet's line of flight.

So I worked on makin' my winny shoot w/ Rumluvers RUM. With the weather so lousy I couldn't chronograph anything but made major progress anyway.

Been working on implementing an old ignition idea. Seems a lot of people tho't of it but no one does it. Guess its a secret. And I'll keep it that way for a bit.

Took all last evening an most of today to tool up for it. Tool up means scrounge around for objects that will serve the purpose though they weren't designed for it; pester the neighbors and make a couple of trips to town.

Finally got enough things put together enough to make things go bang.

Loaded up my first try. This is far enough out of the ordinary that first, I removed the scope (it would be hard to replace), next I secured the rifle to a shooting rest that I made with inner tube strips and a bunge cord across the butt and enough line to let me hide behind one of the big poplar trees in the back yard.

Well, she went bang and everything held together. It was a pretty squibby load, as it turns out, but I didn't know that until she went bang.

Armed with greater confidence I dumped in another 14 grains of 4831. This time I was like super man. I just held the rifle in one hand an reached around the poplar tree and let her rip. Bigger bang but no problems.

Then had to switch to 4831sc as 71 grains of 4831 filled 1/3rd of the neck. I had aready shot 74 gr 4831sc without my modification so 71 grains seemed reasonable.

Did the same thing. Shot her like a handgun from the other side of the tree. Bigger bang.

Lessons learned:

The idea works. Without the chrono I won't know whether it works well or not so well.

Neglected to use ear protection and noticed that the noise was reduced in a major way. The only other time I forgot to use the muffs my ears rang for a day.

Gained even greater appreciation for the Holland QD brake.

Will post more results when the weather allows the chrono to come out and play.

[Martini25-308]

The 25-308 is a gun that my wife's father built in the late 40s or early 50s. It has not had any attention in just about that long,,, since he died when she was 6 years old and that was in '58. My son in now 13 and "way into guns" so I decided to try and figure out what this thing was. I searched Google for 25 Souper and found Rocky's article, which led to this web sight. I thought it would be a good deer/coyote rifle for him and get me back into hunting. (That is the reason I was not up on the new calibers, the .338 RUM could be 20 years old and it would be new to me.)

So I got dies ordered, squeezed some .260 Remington brass, got in .257 bullets, yadi ya and developed a serious ailment called "way into guns". I am waiting for the 25 to get back from the smith, I had to have the Mauser action redrilled for new scope mounts, so I can start load development. I just hope the thing shoots straight!!!!

Been out a few time calling yotes and been in a goose blind for a couple days,,,,,,,,,,so I guess there is a new powder burner in town and his name in Martini.

Its fun reading you guys and have been learning alot and if you need a new kicking stump, me and my little 25 are here thumbing through the threads.

Tini

[RUMLUVER]

Welcome Martini,


Glad to hear your back into the powder burning brotherhood! That 25-308 sounds like a neat little cartridge though I will confess I would lean toward the .260 if it were my choice. As you can see I love to shoot my .338 RUM but like you my father felt that my .338 was something that should be fired via a lanyard. I did not let that sway me I have learned to shoot this RUM quite well but will admitt 20-30 rounds is enough at 1 sitting for me. Since you were talking about having a little work done on that 25-308 of yours I will share that I am knee deep in my current rifle project that will end up as my very own .264 Win Mag oh the joy of it all this rifle consumes my thoughts daily! It will be a 27" Broughton barrel on a model 700 action and in stalled in a McMillan stock topped off with the new 3-10x50 Kahles Multi-Zero scope. But as for this moment I'm still waiting for my barrel to be delivered. Again Martini glad to see you jumped in with both feet and as always keep us posted on the progress with your 25-308!

[royinidaho]

Martini

Glad to hear the 25-308 is on a mauser action. Was hesitant to mention it but I jumped to a wrong conclusion that it was on a Martini action. Couldn't quite see that.

Rocky is probably the knowedgeable on on that cartridge around these parts.

Good to hear you and you son have a common interest. That is a good thing.

Good luck and good shootin' and welcome aboard.

Wanna try a 338-308

[Martini25-308]

Thanks Rum,

After 20-30 rounds you probably need to bring in the bulldozer and rebuild your dirt pile to shoot into . Lanyard??? Hell you should be rolling it around on two wheels?!?!

Now the 264 is my kinda round. I think that would be great caliber for the hunting I plan to do. Your dirt pile should last longer also! The Kahles will be some great optics for you. I have looked at ton of scopes in the last couple months and that one has ranked high. Hope it turns out to be the firearm you have dreamed of. At least worth all the sleepless nights thinking about it .

The 260 brass was the closest dimensions to what I needed for the 25-308 1/4 bore. The case is the same as the .308, necked to .264. So basically I just necked it to .257, for a 25 caliber. It should be a shooter. 3000fps with a 75 gr V-max or 85gr BT should be easily achieved with 3400fps well within reach at the top end. According to some of Rocky's information, a 100gr should push about 2900, which should be just fine for a heafty mulie. There are 117gr and a few 120gr bullets out there for the caliber and will get a load for them also. I can't wait to throw some lead!

I need to wait for the gun so I can get some chamber dimension before I start seating bullets. I have a machinist friend making me a few tools so I can get the correct case length and OAL.

There will eventually be more guns, but I need to work with what I have now.

[Martini25-308]

I have some Martini action going on right now in fact. Wish you were sitting across the desk chompin' on an olive.

Bottoms up or tops down, whichever you prefer.

ttttttttini

[TKO]

Your results are very impressive. I have a pair of the 7mm rums and love the way they shoot. After reading your results I might have to make a trip out to the gun shop and see about getting a 338. I don't need it but I am starting to want it!

[RUMLUVER]

TKO,

I was a little hesitant when I saw my .338 at the gunshop but decided I just had to have it and never looked back. Let me tell you that the .338 RUM is a handfull but it is also alot of fun to shoot. Wait until you see the looks you'll get at the range from your fellow shooters!

[royinidaho]

Just about 10 days away from having the 338 RUM inhand.

Have the tubbs final finish kit on hand.

Getting excited....

[RUMLUVER]

Let me know how it shoots! You must be excited to be that close to getting your .338 RUM.

[Martini25-308]

I am predicting lots of thunder in Idaho this spring !!

[royinidaho]

New stuff from RamShot

.338 Remington Ultra Magnum
Barrel: 24", Twist 1-10" Primer: FED 215
MAGNUM 215 SIE SPBT 94.0 2,920 104.0 3,200 63,400 3.580
MAGNUM 250 SIE HPBT 86.0 2,600 96.0 2,970 62,500 3.580
MAGNUM 300 SIE HPBT 80.0 2,400 89.0 2,700 62,700 3.580

[RUMLUVER]

Roy,

Thanks for sharing but I will say that I have tried Magnum in the past in my .300 RUM and found that it to be inaccurate with every bullet I tried. I don't know about my .338 RUM so since I still have some I may just try it. If you use it and find any good results I would be intrested in what you come up with. Thanks again!

[RUMLUVER]

Roy,

Do youhave anything good to report as of yet on your .338 RUM project?