ready to do a final co-witness zero wondering the distance options?..need to find
and make it a sticky please. tia.
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I wonder if @Buffman-RANGE is aware of any.
Only from the 16"
The issue at hand is making a compromise with the zero because if you zero with SS197SR at say 15 yards (that’s where I zero’d mine at), and then shoot any other load the POI will change.
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Thx Matt…
any way to extrapolate this math to a 5.2" Rock barrel? I’d think FN has pistol info somewhere as they must have presented it to NATO in hopes of replacing the 9x19mm cartridge…Be nice to know even ballpark numbers.
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K, so why 15yds.? I kill the X @15, where does that put my 40gr. V-Max out 25 & 50yds.? that’s info I’d like.
Someone would have to help me understand how to test/calculate that. That’s data I don’t know how to collect. 15 yards is where I typically zero my 5.7 handguns at:
15.6/50=.312
16/50=.32
7.8/25
8/25
1inch of barrel equals 3.125x5.4inches=16.875 yards=50.625 feet is where it should zero
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not certain I completely understand your equation but will continue to zero @ 51ft. until I do.
You don’t really need to understand the equation. What you need is a ballistic calculator. If there aren’t existing charts (which there kinda are) you can use an “app,” either a web-app or one you download to your phone. There are dozens of them. A web search will find you all of them.
Here’s a straight forward one:
For instance, 5.7 loaded with 40gr. V-Max, select .223 Rem with the V-Max bullet and give it the velocity (probably around 1700 to 1800 fps), and click go. It’ll chart out the trajectory for you and give you a graph and a spreadsheet (which is within an inch or two out to about 120-ish yards.
If you have the details to fiddle with you can use something more granular like:
Peace favor your sword,
Kirk
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perfect, thx.