Is there a way to calculate your velocities with out a Chronograph? ? ?
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Is there a way to calculate your velocities with out a Chronograph? ? ?
Not that I'm aware of. I think without a chronograph you're just guessing since each barrel is different so will have different velocities from what manufacturers or reloading manuals post.
Even factory loads are not even close
Chronographs are not that expensive anymore. I bought a ProChrono a couple years ago with the remote for around $125.00, and it work great. Luckus
Borrow a friend's or go to the range and when you see someone with one, ask REALLY NICELY if you could fire some shots through it.Quote:
Originally Posted by M.O.A.
However, if your groups are good and you aren't getting pressure signs, I know it is interesting, but what is the value added of knowing the velocity, other than personal satisfaction?
Of course you can. At least a pretty close approximation.
Shoot a well zeroed bullet of known BC at 300-500 (or more) yards noting accurately your drop at those ranges.
Finding accurate BC's can be difficult but the G7 numbers from Bryan Litz for Berger bullets are regarded as being very accurate. Bryan Litz's numbers for other bullets are very accurate as well and can be found in his book.
Plug accurate BC's and environmental conditions (altitude, barometric pressure and so forth) into a good exterior ballistics program such as JBM.
http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi
Then adjust the speed to where the program drops match your actual drops and you have a pretty accurate measure of speed for your rifle at your location.
All that said, a Pro Chrono Digital is a fantastic, inexpensive chronograph and will serve you well.
That is what I was looking for thang youQuote:
Originally Posted by nsaqam
+1 on them not being that expensive anymore. I got a Shooting Chrony with remote screen for less than $90 on sale and it works great.