Hi All, I'm new to long distance shooting and I have a calculation question. I was sighting in my new rifle: R 700 police, 26 in heavy barrel, 6-24x50 vortex and I put a Timney trigger in it. Anyway, I was shooting Federal Gold Metal 168gr Sierra Match King hpbt. Supposed to be 2600 fps and I don't have a chronometer. Here's my dilemma: I was shooting clover leaf groups at 100yds consistently. I made 1 mrad adjustment in elevation during sight in which predictably was exactly 3.6 inches. At 200 yds I expected .55 mrad drop or 4.1 in. But it was only 3 in drop. Why is my calculation so far off?
- Thread starter DocDAJ
- Start date
+1 on velocity. Keep in mind as you push distance, altitude air density and ambient temperature will play a role
In drag/drop.
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In drag/drop.
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Dont get too wound up about calculations. Those are basically models to get you in the ball park. Once you get to the range (aka the real world) you can then gather the actual come up at each distance. It may or may not match your calculations (way too many variables in the real world). Doesnt matter because you just saw and recorded the data. Dont really need a chronograph either. Just shoot the gun, adjust and confirm your dope at distance and gather all environmental conditions. I know thats not en vogue lately, but its the best way to gather actual dope that will work. Good luck
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