Another scope/.300 question

[grey2112]

For the time being, given all the $$ I've been spending on optics, guns, etc. I'm wanting a modest cost solution for this problem and eventually consider better optics options. This would get me in under a $200 price point for now.

I am considering one of the Vortex Diamondback 2-7x35 models with the Dead-On BDC reticles for this application:

.300 Whisper AR upper, 16" barrel, to be used with both supersonic (125 grain bullets launched at 2400fps) and subsonic (220 grain launched at 1050fps)

Now, would I be able to use the Diamondback 2-7x35 model in this fashion:

Sight in for the supersonic 125 grain load, say at 100 or 200 yards for the crosshairs, and then use the BDC for the drop?

Here's what were looking at for a 100 yard zero and the drop:

With 200 yard zero:


Range Velocity Impact Drop
0 2400 -1.5 0
50 2267 1.63 0.92
100 2143 3.06 3.53
150 2022 2.6 8.04
200 1906 0 14.69
250 1794 -5 23.74
300 1687 -12.73 35.51
350 1586 -23.5 50.33
400 1490 -37.74 68.62
450 1401 -55.9 90.83
500 1319 -78.5 117.47
550 1246 -106.07 149.09
600 1181 -139.23 186.3


For the subsonic, I'll probably just use a red dot (mini-dot) attached to the scope itself on a ring, or perhaps work out the drop and click to adjust - but here are the specifics on drop with a 50 yard sight-in on the 220 grain SMK subsonic:

Range Velocity Impact Drop
0 1050 -1.5 0
50 1033 0 4.29
100 1018 -6.67 16.75
150 1003 -21.75 37.62
200 990 -45.46 67.12
250 977 -78.01 105.46
300 966 -119.61 152.85