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.338 Spectre - expected range and accuracy?

Discussion in 'Rifle Country' started by Dannix, Oct 9, 2009.

  1. Dannix

    Dannix Well-Known Member

    I'm eying an AR15 .338 Spectre setup with an AAC can. What kind of range and accuracy should I expect from it with what I would be loading for it, the 300-grain Sierra HPBT MatchKing subsonic?

    I'm finding there's not too much discussion of the load out there, or I'm looking on the wrong places. Not even a wikipedia page on it.
  2. Well, as far as range, 9x19mm is good to around 100 yards without *much* holdover, and this is similar velocity (your subsonic load) - just a heavier bullet with a better BC. So your PBR will be that or a bit more (maybe 110-120 yards PBR for a man-sized kill zone would be my guess; possibly a little less; 80 yards easily though, for a 6" [+/- 3"] kill zone).

    If you know your holdovers, then it could be quite effective out to 400 yards or more pretty easily, albeit with a lot of drop. But it will retain the majority of its (small) initial energy with the very high BC and heavy bullet, for a looooong ways. Just have to know your drop & drift, like anything.

    Accuracy, of course, is a function of barrel quality, chamber specs, crown, ammo quality, etc.

    FWIW, I'm very interested, and have as one of my next 4-5 guns to acquire (very high on my "list"), a .338 spectre - but mine is going to be a turnbolt SBR with about a 10" bbl & can, probably on a Savage action, with a 1 in 6.5 bbl, to stabilize 300s+. I can't see needing or wanting more than one immediate shot from such a rifle (I'm not an 'operator'), and it will be quieter and possibly more accurate as a turnbolt than a semi. Not to mention a lot cheaper to build, and easier to retain your brass. Mine will be strictly a range/fun gun.


    This seems to be the better goldilocks choice than the .300 whisper/fireball or the .500 phantom, since the .500 phantom is just too danged expensive to shoot, whereas the .338 spectre will give you a pretty big boost in power & BC over the .300 whisper (comparing subsonic to subsonic), without much added expense. And a good 9mm pistol suppressor should be useable, at least with subsonic loads.
    Last edited: Oct 9, 2009
  3. Ranb

    Ranb Well-Known Member

    I have an ar-15 in 300 whisper and a Savage in 338 whisper. Both perform well at 500 yards which the the furthest I have shot them. I do not know much about the 338 spectre except that it is shorter than the 338 whisper so it fits in the AR. Check out http://www.silencertalk.com , someone there should have some info.

  4. Werewolf

    Werewolf Well-Known Member

    This guy manufactures the .338 Spectre. He's a very nice guy and may answer your questions. He has a contract with the Feds and supplies his handloads to some military unit.

    Reed's Custom Ammo
  5. NCsmitty

    NCsmitty Well-Known Member

    Cartridge dimensions.

  6. Zak Smith

    Zak Smith Moderator Staff Member

    All of the big subsonics have approx the same ballistics, and Dr.THW got it right, for a 3-5" impact zone you have a maximum point blank range of 110 yards with something like a 40-60 yard zero.

    With an ACOG on a 300 Fireball, I wouldn't call it "effective" at 225 yards: the holdover is over three feet.
  7. Zak Smith

    Zak Smith Moderator Staff Member

    BC makes no difference between these two:
    _Bullet_           _BC_ _MV_         0      25      50      75     100     125     150     175     200     225     250 | YARDS
    240SMK            0.71* 1100 >    1100    1092    1083    1076    1068    1061    1054    1047    1040    1034    1027 | velocity (fps)
                                     -2.70    0.44    1.76    1.22   -1.19   -5.51  -11.77  -19.98  -30.18  -42.38  -56.63 | drop (inches)
                                      elevation maxima 1.80" at 55.32
    300SMK            0.77* 1100 >    1100    1092    1085    1078    1071    1064    1057    1051    1045    1039    1033 | velocity (fps)
                                     -2.70    0.44    1.75    1.22   -1.19   -5.49  -11.71  -19.88  -30.02  -42.15  -56.30 | drop (inches)
                                      elevation maxima 1.80" at 55.33
    Heck, here's a poor BC bullet for comparison
    poor bc           0.400 1100 >    1100    1086    1072    1060    1048    1036    1025    1015    1005     995     986 | velocity (fps)
                                     -2.70    0.48    1.82    1.26   -1.23   -5.70  -12.20  -20.76  -31.44  -44.26  -59.29 | drop (inches)
                                      elevation maxima 1.86" at 55.24
    Summary: BC makes basically no difference in this type of subsonic load.

    The 300gr does have 25% more momentum (mass).

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