For the 338 fans...

Discussion in 'Rifle Country' started by mshootnit, Aug 2, 2022.

  1. mshootnit

    mshootnit Member

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    The new 338 Weatherby RPM for the smaller 6 lug Mark V. Get ready for a 225 gr. bullet in a 5lb. rifle.

    https://weatherby.com/338-rpm/
     
  2. ECVMatt
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    ECVMatt Contributing Member

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    That is actually very interesting. Thanks for posting.
     
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  3. redneck2

    redneck2 Member

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    You go ahead and shoot it and let me know
     
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  4. DM~

    DM~ Member

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    Because I hunted brown bears a lot, I've always been a big fan of the .338. That should make someone a nice combo for hunting bigger big game.

    DM
     
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  5. .45Coltguy

    .45Coltguy Member

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    Another "new" cartridge!? And in .338 no less in a lighter rifle? I'm with redneck2 on this one.
     
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  6. bfoosh006

    bfoosh006 Member

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    Interesting the link shows muzzle velocities for a 24" barrel and a 18" barrel.
     
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  7. sage5907

    sage5907 Member

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    About 5 years ago I got interested in the Weatherby Mark V in 338-06 A-Square so I started following the rifles on GunBroker. I quickly noticed that there were a lot of them for sale. My summation was that a powerful cartridge in a really light rifle is going to have healthy recoil and owners quickly put them on the market. I had previously owned a Weatherby 270 magnum with a very slim barrel and it quickly convinced me that I didn't need the rifle. I think there is something to be learned about how the Weatherby stock on a really light rifle doesn't handle recoil very well. I now own two 338-06 rifles built on Winchester Model 70 featherweight rifles and they are a joy to shoot. The Winchester stock design is better on a featherweight rifle. They weigh about 8 and a quarter pounds with scope and sling. Different strokes for different folks.
     
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  8. Dr T

    Dr T Member

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    My back of the envelope guestimate puts the recoil up around 42 ft lbs. (I assumed 60 gr of powder, 2800 fps, and a about a 1.5 lbs for the optic). They must be doing something magical in the stock...The pictures do show a big muzzle brake.
     
  9. ClemY

    ClemY Member

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    At first glance, the Weatherby. 338 looks very similar to a Win .338 but with a related rim. Am I wrong?
     
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  10. .308 Norma

    .308 Norma Member

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    I'm not sure what a "related rim" is, but a .338 Win Mag is belted, while the .338 Weatherby RPM is not. :thumbup:
     
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  11. .45Coltguy

    .45Coltguy Member

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    Rebated rim.
     
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  12. robin banks

    robin banks Member

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    I shot a 338-378 weatherby and it had a stock break where it felt like a 30-06
     
  13. H&Hhunter

    H&Hhunter Moderator Staff Member

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    Identical ballistics to a .338 WM. The difference is far more expensive and hard to find ammo and or brass for reloading. And it’ll fit in Weatherby’s $3300 + rifle. I have not been impressed with Weatherby rifles over the years, especially in the accuracy department. They are extremely finicky and I’ve seen a fair number that simply won’t group.

    I like the 5 lb rifle idea for certain applications but I’ll have to say no thanks to Weatherby rifles in general.
     
  14. js8588

    js8588 Member

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    An ersatz dangerous game cartridge with a rebated rim in a push feed action. No, I'm good.
     
  15. jmr40

    jmr40 Member

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    Wouldn't be interested for several reasons. A 5 lb 308 is a good idea. Recoil is brisk, but a 5 lb 308 has about the same recoil as a 7 lb 30-06. Brisk, but tolerable. A 5 lb 338 magnum is just too much of a good thing.

    In the real world a 33 caliber rifle offers no advantage over a comparable 30 caliber rifle, just more recoil. Just how much bigger is a 33 caliber bullet than a 30 caliber. Look at your thumbnail. The thickness of a typical fingernail is how much larger in diameter a 33 caliber bullet is. Do you really think a hole that much larger will matter? And they do make 200-220 gr 30 caliber bullets.
     
  16. mshootnit

    mshootnit Member

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    This is the polar opposite of my experience. But yes the ammo is pricey. My Weatherguard is amazing.
     
  17. DM~

    DM~ Member

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    I'm no big fan of Weatherby, but the ones I've shot and the ones I've owned, shot pretty good for the first three shots, more than good enough for a hunting rifle.

    DM
     
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  18. H&Hhunter

    H&Hhunter Moderator Staff Member

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    The newer ones are definitely better. But I seldom find a Weatherby that doesn’t start to vertically string after several shots. I’ve had two that my buddy has sent me recently, both chambered in 6.5-300 that were completely hopeless, erratic and both were sent back to Weatherby.

    My buddy is a distributor and he gives me lots of Weatherby’s to shoot and tinker with for accuracy issues. I can usually get them to shoot okay for three rounds by properly seating the action and shims and then carefully torquing the action screws. But vertical stringing is a well known issue on Weatherby rifles.

    I’d really like to try one of their new carbon barreled rifles and see how it does.
     
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  19. mshootnit

    mshootnit Member

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    If I am understanding correctly, the 338 RPM is a necked up 6.5 RPM. The 6.5 RPM is a lengthened version of the 284 Winchester. The reason they did this was to get near magnum performance out of their smaller 6 lug action. This along with the most modern materials in the stocks, and barrels allows for some of the most powerful, yet lightest carrying rifles on the market.
     
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  20. Nature Boy
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    Nature Boy Contributing Member

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    I imagine shooting it to be something akin to this

    AE5AE3DC-82ED-43D6-955E-5F9B96CFF28B.gif
     
    Last edited: Aug 5, 2022
  21. H&Hhunter

    H&Hhunter Moderator Staff Member

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    Ric Flair ain’t skeert of no featherweight .338!
     
    Last edited: Aug 6, 2022
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  22. Chuck R.

    Chuck R. Member

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    Honestly I'm a little underwhelmed at the performance. I've got a .350RM in a M7 that gets 2730 with 225NPs out of a 20" barrel and it also easily gets 2800 with 200s.

    Mine weighs in at a few ounces over 8lbs "all up" due to the full length laminated stock. I've got a manners on order now that will bring the weight down to just under 7lbs, which is about as light as I'd care to go.
     
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  23. someguy2800

    someguy2800 Member

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    Then I guess a 223 should be the same as a 280 rem then. If one thumbnail doesn’t mean anything, then surely two thumbnails wouldn’t make any difference.
     
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  24. someguy2800

    someguy2800 Member

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    I would love one in 338 win mag, but I don’t see the advantage of a new cartridge other than having something else for weatherby to put their name on and sell $4/round ammo. Weatherby does have a long tradition of supporting their cartridges for a long time so at least brass should be availible long into the future, albeit at weatherby prices.
     
  25. mshootnit

    mshootnit Member

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    Well thats nothing to sneeze at.
     
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