.260 reload question

[copmedic]

https://lh4.googleusercontent.com/-wTE_26Dkulo/Uc-S6H-wnKI/AAAAAAAAAAs/sIOuC35AO8w/s128/photo.JPG

This is my shot group from one of my hand loads today at 100 yards. I am trying to find out what my MV and drop might be for this load at respective yardages (200, 300, 400, etc) I do not have a chronograph nor a range to shoot those distances available to me. My load was Hornady 120g SST, Lapua brass, CCI long rifle primer, 41.0g of IMR 4350, COL at 2.800. It is out of a Criterion barrel 22-24 inches long. Any help I can get would greatly be appreciated.

[bythebook]

Copmedic according to my Sierra info the load you are using from a 24 inch barrel should put you at about 2740 fps. It looks like IMR 4064 would be a better choice if you have some with it you can go to about 3000 fps. I don't have my books handy to look up a possible drop chart sorry.

[earl39]

I can't find the 120 SST listed at all but the 120 AMax with a BC of 0.465 will look like this starting at 2750


sight adjustment needed trajectory values
target elevation windage tgt lead elevation wind lead velocity energy drop from time of
range MOA MOA MOA inches inches inches bore line flight
0 0.00 0.00 0.00 -1.5 0.0 0.0 2750 2015 0.0 0.0000
50 0.25 0.25 1.75 -0.1 -0.2 1.0 2652 1874 -0.6 0.0555
100 0.00 0.75 2.00 -0.0 -0.7 2.0 2557 1741 -2.4 0.1131
150 0.75 1.00 2.00 -1.2 -1.6 3.0 2463 1616 -5.5 0.1729
200 1.75 1.50 2.00 -3.8 -2.9 4.1 2371 1498 -10.1 0.2349
250 3.00 1.75 2.00 -8.0 -4.7 5.3 2281 1386 -16.2 0.2994
300 4.50 2.25 2.00 -13.8 -6.9 6.4 2194 1282 -24.0 0.3664
350 5.75 2.50 2.00 -21.5 -9.6 7.7 2108 1184 -33.6 0.4361
400 7.50 3.00 2.25 -31.1 -12.7 9.0 2024 1092 -45.1 0.5087
450 9.00 3.50 2.25 -42.8 -16.4 10.3 1943 1006 -58.8 0.5843
500 10.75 4.00 2.25 -56.8 -20.7 11.7 1863 925 -74.8 0.6631
550 12.75 4.50 2.25 -73.4 -25.6 13.1 1786 850 -93.2 0.7454
600 14.75 5.00 2.25 -92.6 -31.1 14.6 1710 779 -114.4 0.8312
650 16.75 5.50 2.50 -114.8 -37.3 16.2 1637 714 -138.6 0.9208
700 19.25 6.00 2.50 -140.3 -44.1 17.9 1567 655 -166.0 1.0144
750 21.50 6.50 2.50 -169.3 -51.7 19.6 1501 600 -196.9 1.1122
800 24.25 7.25 2.50 -202.1 -60.1 21.4 1437 550 -231.7 1.2143
850 26.75 7.75 2.50 -239.2 -69.3 23.2 1376 505 -270.7 1.3209
900 29.75 8.50 2.75 -280.8 -79.3 25.2 1320 464 -314.3 1.4322
950 33.00 9.00 2.75 -327.5 -90.1 27.2 1268 428 -362.9 1.5482
1000 36.25 9.75 2.75 -379.5 -101.7 29.4 1219 396 -416.9 1.6689
1050 39.75 10.50 2.75 -437.4 -114.2 31.6 1175 368 -476.7 1.7943
1100 43.50 11.00 3.00 -501.6 -127.5 33.9 1136 344 -542.8 1.9242


I will add that this is with a 10 mph cross wind and target moving at 1 mph at 59 degrees and 78% humidity at sea level

[earl39]

the 123 SST looks like this.


0 0.00 0.00 0.00 -1.5 0.0 0.0 2750 2065 0.0 0.0000
50 0.25 0.25 1.75 -0.1 -0.2 1.0 2661 1933 -0.6 0.0554
100 0.00 0.50 2.00 -0.0 -0.6 2.0 2573 1808 -2.4 0.1127
150 0.75 1.00 2.00 -1.2 -1.5 3.0 2488 1690 -5.5 0.1720
200 1.75 1.25 2.00 -3.8 -2.7 4.1 2403 1577 -10.0 0.2333
250 3.00 1.50 2.00 -7.8 -4.2 5.2 2321 1471 -16.0 0.2968
300 4.25 2.00 2.00 -13.5 -6.2 6.4 2240 1370 -23.7 0.3626
350 5.75 2.25 2.00 -21.0 -8.6 7.6 2161 1275 -33.0 0.4308
400 7.25 2.75 2.00 -30.2 -11.5 8.8 2083 1185 -44.3 0.5014
450 8.75 3.25 2.25 -41.5 -14.8 10.1 2007 1100 -57.5 0.5748
500 10.50 3.50 2.25 -55.0 -18.6 11.5 1933 1021 -72.9 0.6509
550 12.25 4.00 2.25 -70.7 -22.9 12.8 1861 946 -90.6 0.7299
600 14.25 4.50 2.25 -89.0 -27.7 14.3 1790 875 -110.8 0.8121
650 16.25 4.75 2.25 -110.0 -33.2 15.8 1721 809 -133.7 0.8975
700 18.25 5.25 2.25 -133.9 -39.2 17.4 1654 747 -159.6 0.9864
750 20.50 5.75 2.50 -161.0 -45.9 19.0 1590 690 -188.6 1.0789
800 22.75 6.25 2.50 -191.5 -53.2 20.7 1528 638 -221.1 1.1751
850 25.25 7.00 2.50 -225.8 -61.2 22.4 1469 589 -257.3 1.2752
900 28.00 7.50 2.50 -264.1 -70.0 24.3 1412 544 -297.5 1.3794
950 30.75 8.00 2.75 -306.7 -79.4 26.2 1358 503 -342.1 1.4877
1000 33.75 8.50 2.75 -354.1 -89.7 28.2 1307 467 -391.3 1.6004
1050 37.00 9.25 2.75 -406.5 -100.6 30.2 1260 434 -445.7 1.7172
1100 40.25 9.75 2.75 -464.4 -112.4 32.4 1217 404 -505.6 1.8384