1,000 Yard Shooting (M1D Garand Sniper Rifle)

[JustPassingThrough]

And a final side-note, the calculations you sent me were set at sea-level.

Try recalculating the 168 at 3200 feet, with a 105 degree temp. I live (and shoot) in the upper end of Mojavie desert, not Ohio. You will notice that the 168 round, under these conditions, only drops to 1,352 FPS at 1,000 yards.

Hi Mag,

Love those videos. I ran your numbers through Hornady's ballistic calculator using THEIR ballistic data for the round with your velocity. The results are very close to what you've previously posted. Hornady's Humidity is higher then you see in the desert which is working against the calculated final velocity. Even with that factor working against the final answer you're still supersonic. (Your muzzle velocity is probably a tad higher since you probably chrono'd the speed at some distance down range from the muzzle.) So your actual velocity will be slightly higher then reported here.

Hornady's basaltic calculator using your previously posted data.

1316 FPS @ 1000 yards



Here is the speed of sound calculations based on your 105F

1165.374 FPS



1316 > 1165.374 Therefore your still supersonic.

As far as I'm concerned your round is still super sonic at 1000 yards, the video was great and nice shooting.

Here is a snippet from NASA's website. Based on the velocity give by hornady for your load at 1000 yards and your altitude.



So your round is going Mach 1.194

su⋅per⋅son⋅ic
 
–adjective
1. greater than the speed of sound waves through air.
2. capable of achieving such speed: a supersonic plane.

-- Let me propose a real simple video test the next time you shoot at 1000 yards.. Put a camera next to the target (make it a paper target so the impact sound doesn't mask what we're looking for) and record the audio. If the round makes that tell tale "crack" as it passes the camera its supersonic.