Henry Rifle Forums

Is there a formula to calculate velocity when one does not have a graph? The best I have is estimated fps from listed values in my manual.

I purchased a "red" chrony for about $100 new. And I have had so much fun with it! Some manual calculations are close and some way off. The only way to tell is to shoot with one. Velocity x BC = trajectory.

Mine also was only about $100. Money well spent if you are handloading.

This one if I remember correctly.
https://www.amazon.com/Competition-Elec ... =prochrono

I think you would need a base velocity from any specific rifle before you could just calculate speeds at other distances.

There is probably an app for your tablet or smart phone for a ballistic calculator, if you have one. I would think the formula is rather complex for hand computation. I could be wrong. I have been before.

On the subject of chronographs... I spent years with a Pacts. It worked... not especially well but it was cheap and it got me velocity. I considered purchasing one of blue ones that have the fold up console beside you. Think it's CED. Really considered the Ohler but good grief that's a good amount of cash. I agonized over this for several years. About a month ago I grazed my sensor uprights on the Pact1. I decided it was time to retire the old girl. I decided to go with the Pro Chrony. I am really impressed with that one. The whole thing sits down range which can be a issue, but I have not needed to fire as near to the sensors as I needed to with the Pacts. I always hated setting the Pact up but this pro chronograph is easy to setup, stores shots, and catches data with greater reliability. Mine is the Digital one.

Welcome from the Show-Me-State, RedHawk357Mag.

Enjoy your visits on the Forums!

Welcome from CT, Redhawk and thanks for the post.