Velocity
- Thread starter DGY
- Start date
Munkey1973
CGN frequent flyer
- Location
- Regina, SK
I had been using iSnipe for many years.
Later I discovered Berger's free online ballistics calculator, I found the results to be almost identical.
Later I discovered Berger's free online ballistics calculator, I found the results to be almost identical.
I like JBM Ballistics. They have a huge bullet database including Bryan Litz' G7 BC's for some bullets.
The simple trajectory calculator will work well for your needs.
https://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi
The simple trajectory calculator will work well for your needs.
https://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi
Last edited:
Munkey1973
CGN frequent flyer
- Location
- Regina, SK
iSnipe factors in angle to target. But realistically, unless your angle to target is beyond say 25 degrees (incline/decline) and the target is 500 +yards away, then point of impact error is immaterial.
I use iSnipe regularly for F Class T/R and I find that adjusting the wind angle is a far more useful feature.
I use iSnipe regularly for F Class T/R and I find that adjusting the wind angle is a far more useful feature.
Munkey1973
CGN frequent flyer
- Location
- Regina, SK
iSnipe has a tonne of factory loads preset in the program, but it also allows user-defined loads (for your handloads).
With my 308 Win competition load, I use a 200 grain projectile, G1 BC = 0.715 (btw, it is the Sierra 2nd gen MK) with 2,660 fps off the muzzle.
I for ease of use at a tournament, set the calculator to 0 degrees angle to target (even though I could really have maybe about 10 degrees of incline. But set to zero will pretty much get me at the perfect elevation on my "sighter" rounds at every distance..... might have to further adjusts 1/8 MOA up or down to fine tune.
Indeed, with my handload and my scope zeroed for 100 yards, iSnipe tells me I need 29.16 MOA for 1,000 yards and its spot on using 0 degree angle:
if I change that to 10 degrees, I get 28.77 MOA at 1,000
20 degrees, I get 27.35 MOA
30 degrees, 24.95 MOA
40 degrees. 21.62 MOA
Ok m’y entent is only to figure out velocity at other distances than the muzzle(I will get that from my chronograph) but I want to make sure that my bullet choice will expend properly at the given distances I plan to hunt(some bullet expend well in the 1500-1600 FPS and others prefer 1800-2000fps so I want to know if I’m at the right terminal velocity for optimal expansion/penetration!
Munkey1973
CGN frequent flyer
- Location
- Regina, SK
I can dig it. Most calculators should give velocities at distances, and they should all yield relatively consistent results.
As mentioned before, I recommend iSnipe.. cost about $14 when I bought the app years ago.
Once the app is installed, you don't need the internet to run calculations (unless you want it to automatically input current weather conditions). The load data for 1,000s of factory rounds is already on the device.
If you want something that is simple (and free) and still provides all the same info at distance as iSnipe, then Berger's web based calculator works just as well.
https://bergerbullets.com/ballistics-calculator/
You can do it by measuring the drop from a 100 yard zero, every 25 to fifty meters, out to the distance you want to shoot. Which is really much more important than knowing your exact velocity.
The older Hornady manuals, up to and including their fourth edition, which was a two book set, had velocity and bullet drop charts for setting scope zeroes.
Example, a .375 diameter X 300 Grain bullet starting out at appx 2400 fps would have, according to the Hornady third edition manual,
muzzle energy - 3838 ft pounds -100 yds -2899 ft pounds - 300 yds - 1605 foot pounds
Velocity - muzzle - 2400fps - -1.5 inches
100 yards - 2086 fps - 0, point of aim and impact.
200 yards - 1802 fps - -6.6 inches
300 yards - 1552 fps - -24.0 inches
I suspect you're asking about a 9.3 mm bullet???
These trajectories and velocities change with bullet shape and diameters. But the above should be pretty close to what you're looking at.
You can extrapolate by comparing these to 35 caliber bullets of the same weight, fired at the same muzzle velocity.
The older Hornady manuals, up to and including their fourth edition, which was a two book set, had velocity and bullet drop charts for setting scope zeroes.
Example, a .375 diameter X 300 Grain bullet starting out at appx 2400 fps would have, according to the Hornady third edition manual,
muzzle energy - 3838 ft pounds -100 yds -2899 ft pounds - 300 yds - 1605 foot pounds
Velocity - muzzle - 2400fps - -1.5 inches
100 yards - 2086 fps - 0, point of aim and impact.
200 yards - 1802 fps - -6.6 inches
300 yards - 1552 fps - -24.0 inches
I suspect you're asking about a 9.3 mm bullet???
These trajectories and velocities change with bullet shape and diameters. But the above should be pretty close to what you're looking at.
You can extrapolate by comparing these to 35 caliber bullets of the same weight, fired at the same muzzle velocity.
