Originally Posted by MontanaMarine
Originally Posted by SanCalPigHunter
Originally Posted by MontanaMarine
I wouldn't think a 270 AR would exactly be anemic at 600 yards.

140 AB, 20" bbl, BL-C2, 59K psi, 2600 fps.

Code
Tabular trajectory data at Non-Std. Atmosphere
 Gunsite altitude : 4500 ft.
 Air density      : 0.061325 lb./ft�
-------------------------------------------------------------------------------------
 Gun / Ammunition : .30 Rem AR, edited to 270 AR
 Bullet           : .277, 140, Nosler AccuBond 54765
 Bullet weight    : 140 grains or 9.07 Grams
 Muzzle velocity  : 2603 fps
 Crosswind speed  : 10 Mph 
 Ballistic Coefficient(s) (G1): 
 C1=0.496@V>0 fps;


 
 Range  Velo Time of  Energy   Path    Deflection    Total  Sight correction  Target
        city  flight            to    at crosswind    drop   for setting new   lead
                                LOS    of 10.0 Mph             zero range     20 fps
-------------------------------------------------------------------------------------
�Yards   fps     s    ft.lbs.   in.    in.     MOA     in.   Clicks     MOA     yds �
-------------------------------------------------------------------------------------
|    0  2603  0.0000   2106    -2.0    0.0   -----     0.0   ------    -----    0.00
|  100  2463  0.1184   1885    +1.8    0.5    0.52     2.7     -5.1    -1.76    0.79
M  120  2435  0.1425   1843    +2.0    0.7    0.59     3.8     -4.5    -1.56    0.95
X  200  2327  0.2428   1682     0.0    2.2    1.04    11.0      0.0     0.00    1.62
P  246  2266  0.3031   1595    -3.0    3.4    1.34    16.9     +3.4    +1.16    2.02
|  300  2195  0.3761   1498    -8.4    5.3    1.70    25.8     +7.8    +2.67    2.51
|  400  2068  0.5173   1329   -24.0    9.9    2.37    47.9    +16.7    +5.73    3.45
|  500  1945  0.6655   1175   -47.4   15.7    3.00    77.8    +26.3    +9.05    4.44
|  600  1825  0.8238   1035   -79.9   23.3    3.70   116.8    +37.0   +12.72    5.49


Are you saying it is or its not?



I'm saying it looks like it should be able to deliver very useful terminal ballistics at 600, from a 20" bbl, without red-lining pressure.


If his barrels are faster than QL predicts? Can you in put COL and barrel threading? I need to get a copy of this software!!