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sbr experts wanted....help a noobie

Discussion in 'Black Rifle Forum' started by nickod, Aug 29, 2011.

  1. nickod

    nickod sammyb

    397
    0
    Oct 7, 2010
    i have fallen in love with the idea of a 10.5" sbr but i want something that can reliably perform well out 100 yards and maybe even 150. i dont think a 10.5" 5.56 can do much better than 50yrds with fragmentation thresholds of even 5.56 tap. so what caliber? 6.8, .308, 6.5, or the new 300 blk ? i dont really know what im doing i just need pointed in the right direction. am i chasing a pipe dream thinking i can build a 10.5" that can still have effective ballistics out at 100 & 150 yards? also if any one knows how mk318 sost ammo will perform out of a 10.5", that info would be greatly appreciated! thanks again guys.
     
    Last edited: Aug 29, 2011

  2. WoodenPlank

    WoodenPlank Who?

    7,958
    3
    May 15, 2010
    NW Florida
    With good ammo, a 10.5" can be effective well past 50 yards. Not as effective as an M4, Mk. 12 or M16, but still effective. I would suggest getting either 75gr TAP 5.56 (not the .223 version) or 77gr Black Hills. Unfortunately, I don't know offhand of anyone loading the 70gr TSX to match the 5.56 Optimized that's being used in Mk. 18s downrange.

    As for accuracy, I can make very consistent hits on an 18" round plate at 150 yards with my 10.5" SBR shooting offhand without a sling. That's while using standard Federal XM193.

    I also have met several professional trigger pullers that have hit military poppers at 550 and 750 yards with 10.5" and 12.5" barrels and ACOGs.
     
    Last edited: Aug 29, 2011
  3. BBJones

    BBJones

    1,173
    0
    Mar 2, 2010

    Accuracy out of a 10.5 will be fine, but 5.56 does lose alot of velocity with that short of a barrel. If it was me and I wanted a 5.56 SBR, I would get a 12.5"

    For 10.5" do not get a .308 that is insane. I would look into 300 AAC Blk. It can use all of the same parts as a 5.56 gun (except barrel). Round acts alot like 7.62x39 or 30-30 but can be made very accurate. It can be loaded sub-sonic too and works great with suppressors. That said if you don't reload, might not be a great idea.

    What do you want the rifle for? Just to add to the collection or is there a specific purpose?
     
  4. cyrsequipment

    cyrsequipment Angry

    1,693
    1
    Aug 8, 2004
    Maine
    Aw, come on... a .308 out of a 10.5" barrel would be sweet... The concussion alone would be lethal out to 50yds at least...:shocked:

    A few years ago there was a little trend in my area for agencies to go with short barreled AR-10 type weapons... I saw 1 (one) team that actually trained with the weapon and touched it off in a building... that pretty much ended ALL interest in the system....
     
  5. Glockdude1

    Glockdude1 Federal Member CLM

    24,191
    2,570
    May 24, 2000
    Beaumont,Texas
    [​IMG]

    [​IMG]

    :supergrin:
     
  6. cyrsequipment

    cyrsequipment Angry

    1,693
    1
    Aug 8, 2004
    Maine
    :shocked:

    Mommy....

    Although, I DO want one, or two...
     
  7. Glockdude1

    Glockdude1 Federal Member CLM

    24,191
    2,570
    May 24, 2000
    Beaumont,Texas
    Christmas is coming up....... :supergrin:
     
  8. Javelin

    Javelin Got Glock? Silver Member

    13,775
    3
    Feb 9, 2008
    N. Dallas
    I would go 300 blackout and 8 inch barrel. Noveske makes a nice rifle.
     
    Last edited: Aug 29, 2011
  9. nickod

    nickod sammyb

    397
    0
    Oct 7, 2010
    yup.....i was thinking 300 blk too. im cunfused on how the sub-sonic ammo works though, at sub-sonic levels wouldn't it just poke a .30 hole creating a wound typical of a handgun? anybody know how this works? i have been all over the 300 blackout forum over at silencertalk.com but cant find any info on ammo and fragmentation or max effective ranges or any of that.
     
  10. WoodenPlank

    WoodenPlank Who?

    7,958
    3
    May 15, 2010
    NW Florida
    The subsonic uses a 220 grain SMK bullet. I don't know about fragmentation velocities on either the 123gr or 220, but expect it doesn't need much - at least not with the 220gr SMK. Ammo is still somewhat scarce on the ground, so expect to either order online or reload your own.
    I eventually want to go to 300BLK, but my 5.56 SBR has left me exceptionally happy in every way except muzzle blast/volume.
     
  11. Javelin

    Javelin Got Glock? Silver Member

    13,775
    3
    Feb 9, 2008
    N. Dallas
    With subsonic 220gr ammo you are accurate out to about 300 yards. As far as ballistics and terminal penetration it is definitely lacking a tad in that department. Though if you want to use a little lighter bullet (120-150gr) the bullet really shines and has all the power you need for even larger game such as deer & even elk.

    It is a very versatile round and as mentioned above it will become more of abundance later this year. I love my 10.5" Noveske 300 AAC Blackout and it has quickly become my favorite firearm.

    [​IMG]
     
  12. nickod

    nickod sammyb

    397
    0
    Oct 7, 2010
    yup.....the above pic is exactly why i have in mind. i cant wait till more info and research is available for the current ammo. and i especially cant wait till some improved ammo becomes more available. i really want to know what the 220 smk's are going to be doing in soft targets and barriers and at what ranges they will do it at.
     
  13. Javelin

    Javelin Got Glock? Silver Member

    13,775
    3
    Feb 9, 2008
    N. Dallas
    What terminal ballistics on soft targets are you wanting info on? It will do much better than a 5.56 for material penetration. Though the 75gr. 5.56 beats out almost everything in terms of soft tissue damage.
     
  14. eracer

    eracer Where's my EBT?

    6,711
    2
    Apr 5, 2011
    Tampa, FL
    That's exactly what I thought....

    Waiting on suppressor stamp.

    [​IMG]

    [​IMG]
     
    Last edited: Aug 29, 2011
  15. Javelin

    Javelin Got Glock? Silver Member

    13,775
    3
    Feb 9, 2008
    N. Dallas
    That is sexy! Are you going with a 762SD can?
     
  16. eracer

    eracer Where's my EBT?

    6,711
    2
    Apr 5, 2011
    Tampa, FL
    762-SDN-6

    It mocks me from the dealer's holding area every time I visit...:supergrin:
     
    Last edited: Aug 30, 2011
  17. BEER

    BEER bad example

    6,850
    1
    May 2, 2006
    Dayton, Texas
    if you're going to be shooting at 100-150 yards "regularly" why would you want an sbr instead of a full length rifle? it's my understanding that an sbr is intended to be compact for ease of movement in and out of vehicles and for close quarters work inside buildings.

    don't get me wrong, if you just want an sbr to have one then more power to ya, but to me it sounds like you're after the wrong tool for the job and trying to pound a square peg into a round hole.
     
  18. nickod

    nickod sammyb

    397
    0
    Oct 7, 2010
    I agree with you. But explain to me why I see so many pictures of sbr's with magnified optics mounted such as the 300 blk pictured above. There has got to be a caliber ammo combo that will give an sbr an effective range of greater than 100 yards, no?
     
  19. WoodenPlank

    WoodenPlank Who?

    7,958
    3
    May 15, 2010
    NW Florida
    A lot of those magnified optics are along the lines of 1.1-4 or 1.5-5, enabling their use up close and at slightly longer ranges. A 5.56 SBR still is capable of making hits at several hundred yards, and many modern OTM bullets will fragment at lower (sub 1500FPS) velocities, so they are still effective. Like I said earlier, not as effective as a longer barrel, but I sure as crap wouldnt wanna get hit by a 75gr TAP out of an SBR at ANY distance.