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Posted: 7/4/2007 7:32:29 PM EDT
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I am debating if I want to buy a RRA .40 S&W when they come out. I am wondering about the ballistics of the 180 gr hp out of a 16 inch barrel. I have played with a ballistic program and came up with the following: 25yds: +.5 50yds: zero 75yds: -2.8 100yds: -8.0 does this sound correct? If not, can someone point me in the right direction? |
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Let's figure that with 12" more barrel than a 4.5" 40SW pistol, you'll get about 12 * 25fps = 300fps gain in rifle vs pistol. Some figures using hot, lighter, flatter shooting Corbon Loads: 165gr at ~ 1,450fps with 50yd zero: Range (yards) _________Muzzle 25 50 75 100 150 200 Velocity (fps) __________1450 1380 1315 1255 1200 1110 1041 Energy (ft.-lb.)_________ 770 698 633 577 528 452 397 Trajectory (50 yd. zero) -0.5 0.3 0.0 -1.6 -4.5 -15.1 -32.7 135gr at ~ 1,625fps with 50yd zero: Range (yards) _________Muzzle 25 50 75 100 150 200 Velocity (fps) __________1625 1545 1470 1399 1332 1214 1121 Energy (ft.-lb.)_________ 792 716 648 586 532 442 377 Trajectory (50 yd. zero) -0.5 0.2 0.0 -1.2 -3.5 -12.0 -26.3 |
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