22LR ballistics/trajectory

[GMC man]

I zero at 100 yards and it's 4 inches high at 50 yards and approx 50 inch drop at 200 yards. I hope it helps you, I am lucky to have a outdoor range that goes up to 500 yards.

here's the link to the range

http://www.sureshotgunsports.com/

 

[rraisley]

I'm sighted in zero at 25 yards, about 1" low at 35 feet with Federal 40 grain RN Gameshok.

So, I assume the 25 yds is the "first" zero - where would the next zero be? 100 yds?

According to my spreadsheet, and assuming you get the published 1240/1103/1010 fps at 0/50/100 yards, and assuming iron sights at about 2.62" above the bore (which is what my 15-22 MOE is), if you sight in at 25 yards, you will be 2.3" low at 100 yards, and at 79 yards you'll also be at zero.

The only thing changing those values is the bullet velocity profile and the height of your sight above center of bore. My scope is 2.8" above, which would result in 1.8" low at 100 yards, with the second zero at 84 yards. Mounting your scope at 3.4" above center would actually result in zeros at both 25 and 100 yards, but that's getting higher than you might want.

 

[GMC man]

According to my spreadsheet, and assuming you get the published 1240/1103/1010 fps at 0/50/100 yards, and assuming iron sights at about 2.62" above the bore (which is what my 15-22 MOE is), if you sight in at 25 yards, you will be 2.3" low at 100 yards, and at 79 yards you'll also be at zero.

The only thing changing those values is the bullet velocity profile and the height of your sight above center of bore. My scope is 2.8" above, which would result in 1.8" low at 100 yards, with the second zero at 84 yards. Mounting your scope at 3.4" above center would actually result in zeros at both 25 and 100 yards, but that's getting higher than you might want.

thanks rraisley I couldn't print you notepad so I just finished transferring your data to excel

 

[rraisley]

thanks rraisley I couldn't print you notepad so I just finished transferring your data to excel

If you need any other data, let me know. I'd post the spreadsheet, but it's pretty ugly, and customized for all my guns. Well, for my target pistols and the 15-22.

 

[deallad]

if you go on the hawke website you can download their calculator software its free, also do an app for the iphone soo good when on the range

 

[tsudduth]

According to my spreadsheet, and assuming you get the published 1240/1103/1010 fps at 0/50/100 yards, and assuming iron sights at about 2.62" above the bore (which is what my 15-22 MOE is), if you sight in at 25 yards, you will be 2.3" low at 100 yards, and at 79 yards you'll also be at zero.

Does this mean that the aim point (putting the cross hairs on the bulls eye) is the same at 25 yds as it is at 75yds?

 

[jkc]

Your dot will cover the bullseye at anything over 75 yards or so. Red dots aren't really made for anything but up close quick acquisition shooting.
If you can, sight your irons for 50 yards and longer shots. Then you have the best of both worlds.

This is silly advice. You can use your red dot the same way you use iron sights, by adjusting the dot for a six-o'clock hold. There's no rule saying you need to superimpose or cover the target with the dot --- it's just a point of reference. Yes its quick at close quarters to simply put the dot on the intended POI, but it's also easy to use the red dots with much more finesse. I can drive tacks at 200 yards with an Aimpoint 2MOA dot on my very accurate .223 Contender Super 14.

 

[rraisley]

Does this mean that the aim point (putting the cross hairs on the bulls eye) is the same at 25 yds as it is at 75yds?

Pretty much, yes. The bullet is on the rise when it hits 25 yards (this is because the barrel has to be raised due to the sight being substantially higher than the barrel). It continues higher to roughly 50 yards, reaching its peak at maybe an inch higher than you would be sighting it. Then it starts dropping to reach close to zero near 70-80 yards (depending on velocity profile). Then drops continuously, maybe 2-3" at 100 yards, much more further on.

 

[hkyplr]

I just wanted to expand a little more on what rraisley said. The two yardages your sights will be on are determined by two things. 1) The specific ballistics of the bullet you are shooting. Some have a flatter trajectory while some have more of an arched trajectory. 2) The height above barrel line your sights are set at. These two factors will affect the yardages, but 25 and 75 are a general rule of thumb.