Re: 338 at 1 mile
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lindy</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Whats the retained velocity at that distance?</div></div>
Kind of hard to say without some information about the environmental conditions. My experience with that round leads me to suspect that it's subsonic, though. Can't have been very warm in Kansas.
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Actually a pretty nice day made it up to 60*, at the time of shooting (4.30 pm) it was mid 50"s, elev. is 1120, dew point was in the low 30's. I've had to play with the velocity and bc to get close to observed performance, pushed the velocity up to 3100 and bc @ .611 and it gets close to what we see in the field.
My chrono is a Prochrono Digital and has always been reliable, I ran 10 rounds across it. Our best guess is 1160 fps @ 1760 yd. Scope is a SN-3, 3.2-17X44, range was arrived at with Swaro and Leica. The table below is very close to our observed performance. It didn't copy real well, first row is yds, second is retained velocity and last is come up.
Range
Yards Velocity
f/s Energy
ft-lb Path
inches Drop
inches Drift
inches TOF
sec CDFC
inches Mntum
lb-f/s Zero Adj
MOA
0 3100 5336 -1.50 0.00 0.00 0.00000 1.50 110.7 ---
100 2953 4842 0.00 -1.87 0.21 0.09916 0.21 105.5 0.0
200 2811 4388 -2.49 -7.72 0.86 0.20328 2.63 100.4 1.2
300 2673 3968 -9.38 -17.98 1.97 0.31272 9.58 95.5 3.0
400 2540 3582 -21.13 -33.11 3.59 0.42785 21.43 90.7 5.0
500 2410 3226 -38.28 -53.62 5.74 0.54910 38.71 86.1 7.3
600 2284 2898 -61.42 -80.13 8.48 0.67696 62.00 81.6 9.8
700 2162 2596 -91.22 -113.30 11.84 0.81195 91.99 77.2 12.4
800 2044 2319 -128.47 -153.91 15.88 0.95467 129.45 73.0 15.3
900 1929 2067 -174.04 -202.86 20.66 1.10577 175.27 68.9 18.5
1000 1819 1837 -228.97 -261.16 26.24 1.26593 230.47 65.0 21.9
1100 1713 1630 -294.42 -329.97 32.68 1.43590 296.22 61.2 25.6
1200 1613 1444 -371.72 -410.64 40.05 1.61645 373.87 57.6 29.6
1300 1517 1278 -462.41 -504.70 48.42 1.80832 464.94 54.2 34.0
1400 1428 1133 -568.22 -613.88 57.85 2.01225 571.16 51.0 38.8
1500 1346 1006 -691.10 -740.13 68.40 2.22883 694.48 48.1 44.0
1600 1271 897 -833.20 -885.6 80.09 2.45847 837.04 45.4 49.7
1700 1205 806 -996.87 -1052.6 92.94 2.70128 1001.19 43.0 56.0
1800 1147 731 -1184.5 -1243.7 106.92 2.95696 1189.36 41.0 62.8
1900 1099 670 -1398.7 -1461.2 121.97 3.22478 1403.99 39.2 70.3
2000 1058 621 -1641.7 -1707.6 138.01 3.50383 1647.50 37.8 78.4
2100 1023 581 -1916.0 -1985.2 154.96 3.79322 1922.22 36.5 87.1
2200 992 547 -2223.7 -2296.3 172.76 4.09220 2230.35 35.4 96.5
2300 965 517 -2566.9 -2642.9 191.35 4.40020 2574.04 34.5 106.6
2400 941 492 -2947.9 -3027.2 210.69 4.71681 2955.39 33.6 117.3
2500 919 469 -3368.5 -3451.3 230.77 5.04172 3376.44 32.8 128.7