300wm rechambering to????

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by spdcrazy, Nov 11, 2011.

  1. spdcrazy

    spdcrazy Well-Known Member

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    i am interested in having a new barrell made for my 300wm. figured i should do some thinking and research before i spend some money.

    question is, should i think of rechambering to something different. first thought was 338, but from my initial research, it wont do me much good. heard 300ultra can get me some flat long range shooting! what is your thoughts?


    by the way my 300wm is a savage model 110 if i remember right. has the accutrigger as well
     
  2. youngbuck

    youngbuck Well-Known Member

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    What do you want out of the new chambering? Flat shooting? More energy? 338s are great for more energy over .30 cal, but they aren't "flat shooting". A 300RUM over a 300WM isn't a huge change in much of anything; drop, energy, extended distance while over minimal expansion velocity. IMO, you can improve those things easier with bullet choice instead of more powder. A 300RUM will be a little "flatter shooting" over your 300WM, but I'd say 95% of the critters you will use it on will not be able to tell a difference.If you go 338, chamberings will be limited to your action.
     

  3. spdcrazy

    spdcrazy Well-Known Member

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    Flat shooting is my goal. The 300wm has enough energy for the biggest game in my area but I want to play at distance as well
     
  4. spdcrazy

    spdcrazy Well-Known Member

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    From what I've read rechambing g to a 300rum is fairly simple and with a heavier and longer barely I can reach over 3300fps. Anything else I should consider? Cost of loads doesn't bother me to Much. Nor does recoil. Just want the most efficient rifle if I plan to start building it.
     
  5. youngbuck

    youngbuck Well-Known Member

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    Shoot a lighter bullet for flatter trajectory and speed. I'e heard some guys run 3300fps w/ 180s. My 180gr load was a little slower. If you run 165s or 150s you'll have a flatter trajectory (at the front end anyway) and more muzzle velocity.

    If you want to play at distance forget flat shooting and muzzle velocity. Look at velocity on target and energy when it gets there. I shoot a 208 and a 230 now in my 300RUM.

    Only downside to going to a RUM you haven't mentioned is barrel life.
     
  6. spdcrazy

    spdcrazy Well-Known Member

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    ok i follow you, but if i can get comparable numbers with my wm as a rum, is there any advantage to going rum?

    what about other rechambering options? anything i should consider?

    i don't want to get a barrell and get set up with my wm then later find out i should have gone rum, 338, etc.
     
  7. Bart B

    Bart B Well-Known Member

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    I'd get either a Rem. or Win. rimless magnum case with the H&H magnum diameter head in 30 caliber. They're much easier to reload for best accuracy. Anything with a belt is a hard way to go. And the muzzle velocity spread across these standard length action cartridges is too small to fret over. Besides, any bore over 30 caliber is typically harder to shoot accurate from the shoulder; too darned much recoil disturbing where the muzzle points while the bullet's goin' down the barrel.
     
  8. youngbuck

    youngbuck Well-Known Member

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    Some guys dislike belts more than others. If it were my choice I'd pick belt-less over belted on a new tube, If I needed a new one. I have a 7rm that will out-shoot any of my beltless LR rigs I have set up at this time. Plenty of critters have gone down with a 7rm or 300wm, both belted mags. If your 300WM barrel is worn out, a RUM may be something to consider. If you have money burning a hole in your pocket, it would be even better to go with a RUM. If you are looking to extend your range or "kill things deader" it may not be worth the time/money. Don't get me wrong, I like overkill. I hope to shoot a 100lb deer with a 338LM in December. If you want to have the fastest, just to have the fastest, look at the 30-378WBY. I like hot-rods too, but there's not much a 300RUM is capable of a 300wm would not be. I own and shoot a RUM, the only benefits are telling my 300WM buddies they don't have one, and I don't have to deal with a belt, and that is not a big deal to me. I used to want the biggest and baddest, in the game of LR hunting, someone will ALWAYS have something bigger faster and more powerful than you, that's the name of the game. In all honesty I would not feel handicapped in the least bit going with a RUM. There are many, many more important things than case capacity when it comes to long range hunting. Many guys have posted this before; there is no free lunch. Hot-rod cartridges cost you more than just money.
     
  9. TexasHunter

    TexasHunter <strong>SPONSOR</strong>

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    I'm a fan of keeping it simple, shootable and inexpensive. The choices are .338 WM or RUM, .300 WM or RUM, 7mm RM or STW. All the .338 stuff will increase your recoil substantially as well as the cost per shot. This usually results in less practice and less fun. The 300 RUM can outrun the WM but with a bunch more recoil and a bit more $ per shot. The 7mm RemMag is flatter, easier on the shoulder and wallet and kills quite well. If flatter is what you want, I'd go to the 7mm Rem Mag. The STW takes it further but the ammo is hard to find and burns barrels like crazy. You will appreciate a good brake as well.

    Hope this helps.
    Dale
     
  10. spdcrazy

    spdcrazy Well-Known Member

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    Now ur talking over my head! Your saying ud stick with a 30 caliber but use a different brass shape?
     
  11. spdcrazy

    spdcrazy Well-Known Member

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    Hmm. Haven't thought of a 7mm. What kind of machining is required to rechambing my 300wm to 7mm?
     
  12. TexasHunter

    TexasHunter <strong>SPONSOR</strong>

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    Sorry, I was thinking of a barrel swap. To keep the existing barrel, the only real choice is something in the same caliber - 300 RUM. If the barrel is much less than 26" you would just be wasting powder though. Many factory 300 Win Mag rifles come with 24" barrels which won't let all the powder in a 300 RUM to be used effectively. If you have a 26" barrel - no problem.
     
  13. spdcrazy

    spdcrazy Well-Known Member

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    I am not at all opposed to getting a new barrel. Would like something heavier fluted and with a good brake as well
     
  14. rscott5028

    rscott5028 Well-Known Member

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    I would be disinclined to do a setback or rechamber on a factory barrel unless it had really been an exceptional performer.

    As such, I'd get a top notch aftermarket barrel with a good brake.

    I'd also stick with the 300wm in order to get the most from my existing dies, brass, and supplies. If you don't have good dies or brass, then consider 300WSM or possibly 300 RUM.

    Try the Berger 230gr OTM with a .719 BC for long range shooting. I just started with them and they look very promising.

    The RUM is more expensive to shoot and more recoil. It sounds as though you would incur very few situations where the extra fps will offset those factors.

    -- richard