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Trajectory of the bullet has little to do with bullet weight or diameter. It's has everything to do with ballistic coefficient and velocity. Here is a 20gr vs a 900gr bullet with a .500 BC. Higher BCs will help at long range, but out to 200 yds you will not notice much. As far as 300 Whisper. If you can honestly let a good deer walk rather than take a questionable shot, get one. You need to have a good broadside shot every time. There are expandable bullets. Well one commercially available bullet. The .44,.45,.458,.510 will save you when the shot is a little off the mark. There are a wider variety of expandable bullets for them and to be honest larger caliber stuff does not need to expand. .45 Colt with hard cast will kill any deer. The 300 Whisper in an AR will allow a fast follow up shot. The problem is, no one knows your hunting style more than you. I have 300 Whisper and a 458 SOCOM and love them both. Both have killed deer. Both are ARs. The 300 is like shooting them with a knife blade. The 458 is a lot like a 40mm grenade. As far as trajectory tables go, let me know what bullet you would like to shoot and I will post the chart. There will not be much difference. If you get some standard velocity .22 lr stuff and shoot it out to 200 yds you will get a good idea of what you are getting into.
Name: Test
Ballistic Coeff: 0.500
Bullet Weight: 20
Velocity: 1050
Target Distance: 100
Scope Height: 1.500
Temperature: 70
Altitude: 500
Ballistic Data
~~~~~~~~~~~~~~~
Range Elevation Velocity Energy
0 yds -1.50 in 1050 fps 49 fpe
25 yds 1.94 in 1038 fps 48 fpe
50 yds 3.37 in 1027 fps 47 fpe
75 yds 2.73 in 1016 fps 46 fpe
100 yds 0.00 in 1006 fps 45 fpe
125 yds -4.89 in 996 fps 44 fpe
150 yds -11.88 in 986 fps 43 fpe
175 yds -21.14 in 977 fps 42 fpe
200 yds -32.71 in 969 fps 42 fpe
225 yds -46.62 in 960 fps 41 fpe
250 yds -62.92 in 952 fps 40 fpe
275 yds -81.63 in 944 fps 40 fpe
300 yds -102.78 in 936 fps 39 fpe
325 yds -126.38 in 928 fps 38 fpe
350 yds -152.45 in 921 fps 38 fpe
375 yds -181.01 in 914 fps 37 fpe
400 yds -212.08 in 907 fps 36 fpe
425 yds -246.24 in 900 fps 36 fpe
450 yds -282.40 in 893 fps 35 fpe
475 yds -321.38 in 886 fps 35 fpe
500 yds -363.20 in 880 fps 34 fpe
525 yds -407.89 in 874 fps 34 fpe
550 yds -455.48 in 867 fps 33 fpe
575 yds -506.01 in 861 fps 33 fpe
600 yds -559.49 in 855 fps 32 fpe
Name: tast
Ballistic Coeff: 0.500
Bullet Weight: 900
Velocity: 1050
Target Distance: 100
Scope Height: 1.500
Temperature: 70
Altitude: 500
Ballistic Data
~~~~~~~~~~~~~~~
Range Elevation Velocity Energy
0 yds -1.50 in 1050 fps 2203 fpe
25 yds 1.94 in 1038 fps 2154 fpe
50 yds 3.37 in 1027 fps 2107 fpe
75 yds 2.73 in 1016 fps 2063 fpe
100 yds 0.00 in 1006 fps 2022 fpe
125 yds -4.89 in 996 fps 1982 fpe
150 yds -11.88 in 986 fps 1945 fpe
175 yds -21.14 in 977 fps 1909 fpe
200 yds -32.71 in 969 fps 1874 fpe
225 yds -46.62 in 960 fps 1842 fpe
250 yds -62.92 in 952 fps 1810 fpe
275 yds -81.63 in 944 fps 1780 fpe
300 yds -102.78 in 936 fps 1750 fpe
325 yds -126.38 in 928 fps 1722 fpe
350 yds -152.45 in 921 fps 1695 fpe
375 yds -181.01 in 914 fps 1668 fpe
400 yds -212.08 in 907 fps 1642 fpe
425 yds -246.24 in 900 fps 1618 fpe
450 yds -282.40 in 893 fps 1593 fpe
475 yds -321.38 in 886 fps 1570 fpe
500 yds -363.20 in 880 fps 1547 fpe
525 yds -407.89 in 874 fps 1525 fpe
550 yds -455.48 in 867 fps 1503 fpe
575 yds -506.01 in 861 fps 1482 fpe
600 yds -559.49 in 855 fps 1461 fpe
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