ballistic coefficient Arrows & Bolts

What are you guys using for BC in your calculations and trajectory programs?

 

didnt know that mattered in bowhunting deer and what traj. programs .............

 

I'm sorry sir, can you elaborate

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Trajectory is everything regards the vertical component of your aim and flight path. Tis why there are sight pins or crosshairs on bows.

There are programs that calculate for you. Some you can download and some you can use on a web site interface. You can even make a spread sheet to calculate this. I like my old DOS program. I need to fire up an XP box to use it since it is not compliant with the current 'gov wants to know and track everything you are doing' standards is the newer OS's.


Not to wander too far off topic but that is why backwards compatibility is lost with newer things now: because gov can't keep track.

Anywho, given the relevant parameters like speed, BC, ranges ....and minor things like altitude, temp humidity for very fine tuning .... etc it is not that complicated to contrast the flight path with the line of sight. Hitting high or low and how much at what distances given how you sight in. Very nice to know when aiming at a critter.

BC is pretty well documented for every popular bullet ( and keyed to the model used).

Arrow/bolt data is harder to find. BC can be calculated by shooting over your chrono at varying distances and using the change in velocity. The greater the separation the more accurate the value calculated. But chrono's have issues with lower velocities and not hitting the screens at long distances .... is a worry.

 

Who u callin' sir?