Need some input on alternate .308 MVP caliber barrels

Discussion in 'Modifications' started by Tony Rumore, Dec 2, 2014.

  1. Tony Rumore TROMIX Industry Partner

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    We're going to start off running various caliber barrels for the .223 MVP, but will eventually move on to making barrels for the .308 guns once there are sufficient numbers of those guns in circulation.

    The obvious choices are 7-08, 260 Rem, .243, and 22-250. I'm just not sure which one of those would be the best "launch" caliber to choose. Of course there are others like the .338 Federal, but I'm not sure what kind of intrest those would have. I don't think the .338 Fed ever got any traction in the AR-10 platform. Thoughts?

    Tony Rumore
    Tromix
  2. wood chucker Moderator

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    If I had to guess them in order I'd guess;

    .260 or .243 either one in first place with the other nipping at it's heels.
    .22-250
    7mm-08

    338 Federal and .358 Winchester.


    Some sort of powerful .45 cal suitable for stopping elk, bear, moose and pick up trucks might be fun too.
    Think shoulder mounted hi-speed bowling ball dispenser.
    :D
    bonehedz likes this.
  3. MechTech Moderator/ Damn Yankee

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    338 Fed is a solid big game cartridge, but it is pricey and has decent amount of recoil. Premium bullets have made the .308 one of the most efficient and versatile non magnum hunting cartridge in the 30 cal class. I can remember when Armalite was offering several caliber choices to make the AR10 more appealing to the hunting community. It's all about perceived need and cartridge popularity. That being said, I think 260 Rem is pretty popular in shooting competitions and is a good whitetail cartridge with light recoil. Maybe 260 Rem could be your first offering?What about premium 22" 308 barrels? My 2 cents;).
  4. Surgical_SolutionsX New Member

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    I agree with MechTech a high quality 20" even 22" stainless steel ultra match barrel would be great. When you look at what the guys from Magpul are doing in the Precision rifle series its really impressive. If I recall they are pushing 1,000 yards with 16-18" barrels being fed 175 grain rounds. But when you talk about pumping out that far on something the size of "big game" surely you want the power behind the round. Personally .300WM or when you have to have it, .338...
  5. Al in Mi Active Member

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    243 and 7-08 be my picks for starters
  6. Ryan Towry Member

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    i would love a .243 predator in a 20-22" barrel, next pick would be the 22-250
  7. wood chucker Moderator

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    .243 followed by .22-250 are getting the nod as good idea by patrons of the gun shop local to me.
  8. bonehedz Active Member

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    New forum member here- Tony, my choice in "alternate" calibres for 7.62 MVP would be .243 Winchester first, and .338 Federal second…I had a carbine (bolt action) in .338/08, back before
    Federal standardized the cartridge… .338 Federal would be great in a short barrel (16.25", just like original) and .243 Winchester at 20"…I'm thinking of a short(er) deer rifle…just saw thread on .458 SOCOM barrels…please disregard .338 Federal vote… .243 Win
  9. wood chucker Moderator

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    [IMG]
    Take a look a the energys velocities and trajectories. Pretty impressive and should stop bear, moose and pick up trucks with equal ease.
    http://www.45raptor.com/45RAPTOR/
    Al in Mi likes this.
  10. bonehedz Active Member

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    Thanks for the heads up…I will delay the big-bore for now and wait for reamers to come online…then hide the wife and kids, it's party time...
  11. Keith Moderator

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    Interesting. It looks kinda like an answer to the .458 SOCOM. I hope the cartridges aren't as expensive as .458 is.
  12. wood chucker Moderator

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    Two different means to bring big bore capability to the two different MVP's is all. .458 SOCOM for the small action (5.56) and .45 Raptor for the short action (7.62).

    There is a third capability here. I figure if your .460 S&W magnum revolver were cut for moon clips you could use the same round in both rifle and pistol.
  13. bonehedz Active Member

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    There is a company (whose name escapes me at the moment) that makes moon clips and machines S&W cylinders just for that purpose…
  14. bonehedz Active Member

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    I like the idea of the .45 Raptor, if more than anything else than because it works in a larger caliber rifle…I am certain that the 5.56 is strong enough to take the .458 SOCOM, but call me paranoid, I would like a greater margin of safety when my face and skull are at issue…plus the .45 Raptor, according to my ballistic calculations, should come in around 2200-2250 fps while flinging a 300 grain slug from a 16" barrel…more than enough to dispatch all manner of large, nasty, flesh-eating (read:me) critters…probably even large, nasty critters sporting curved, pointy headgear, bad attitudes, and dinner-plate sized hooves
    LowLight and wood chucker like this.
  15. wood chucker Moderator

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    The guys who engineered the SOCOM did it specifically for the AR15 and to work withing that rifles design envelope with safety margin to spare.
    The Raptor was done up in similar fashion but for the AR10 types and their design envelope.

    According to published data you are right on the money about the 300 grainer.
    http://www.45raptor.com/45RAPTOR/wp-content/uploads/2014/04/45RaptorCompare.pdf
    http://www.45raptor.com/45RAPTOR/wp-content/uploads/2014/04/45RaptorChart.pdf
  16. bonehedz Active Member

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    Looked at Barnes website for the 500 gr Tsx…nada…the biggest bullets I can find in .452 are Beartooth hard cast, gas checked, coming in at a rotund 405 grains…loaded over a full case of Trailboss, it should work just fine…now I may have to sell my .30 suppressor and get a big bore that is rifle-rated...
  17. wood chucker Moderator

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    My hat's off to you sir.
  18. bonehedz Active Member

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    Thinking in particular of Asiatic water buffalo and maybe even capes, if i ever get to Africa to hunt with my dad's cousin Markuu…he's a PH from Lapua, Finland, and hunts all over northern Europe (big boars and bears), Asia, and Africa…hey, if it's not at least a little dangerous, where's the fun in that?
  19. bonehedz Active Member

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    Returning to the original posting subject, I know not too many go for this type thing, but for a .308 length (and based) cartridge, my vote is for a .260 Remington Ackley Improved…I know most do not like wildcats. That's fine…they are, like exotic women, a pain to feed and care for, but the performance…OOO LAH LAH (speaking of rifles here now…calm down everyone)…140 grain slugs pushed at 2940 fps…we are talking L O N G R A N G E here…just my $2.83 worth (that would be $0.02 worth, adjusted for inflation, and before taxes)...
  20. ValleyDawg New Member

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    243 has got to be at the top of my list for sure. At least down here in the south it is one of the most popular hunting calibers and it should fit most 7.62 mags with no modifying.

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