.22 WMR - bullet specifics

[thomis]

Going to be doing some long range targeting with the hunting rifles in a week. I'll take along my old Marlin bolt .22 WMR to plink with during barrel cool-downs. Trying to figure out drop using the ballistic calculator out to 200 yards using CCI's 40 grain TMJ which has a muzzle velocity of 1,875 fps.

Is the .22 WMR actually a .22" caliber bullet? and (this may not be privy to us but) does anyone happen to know the ballistic coefficient of the TMJ bullet they use, or can take a good close guess as to what it is?

TIA

 

[powderx]

I've always been under the impression a 22 WMR bullet is nominally .224" whereas a 22 LR is nominally .223".

There's a lot of speculation and opinion on that of course but my research a while ago seemed to point most concretely to those diameters.

Not that it matters a whole lot. And there are revolvers that fire both through the same barrel (Ruger Single Six is an example).

I've run across ballistics on 22 WMR but I don't recall all if it or for specific bullets. It's out there though!

 

[adelbridge]

http://ballisticscalculator.winchester.com/

 

[gazpacho]

If you can, chrono the bullet out of YOUR rifle. This will give you the most accurate data for ballistic calculations.

 

[rcmodel]

Even better, Zero it at 100 yards with the load you intend to use.
And then shoot it at 150 & 200 yards.
And then, write down the difference.

You can save yourself doing all the Chinese Algebra with a ballistics program that will be wrong anyway with the exact load you are using..

I mean, it's not like you have to go out cold like a Navy Seal Team member and make the first shot count on Bin Laden or somebody at 600 yards.

rc

 

[witchhunter]

As I have come to expect, RC nails it again, nothing beats shooting at known ranges with known ammo and using that data.......

 

[thomis]

I mean, it's not like you have to go out cold like a Navy Seal Team member and make the first shot count on Bin Laden or somebody at 600 yards.

Where the hell did that come from????? Did you take your medication?