POI drop
Can anyone tell me the distance a .25 cricket bullpup will shot before the POI starts to fall. Another way of asking is, if you sight it in at 30 yards how much further will it reach out before POI falls. Discount the wind, and for the sake of this let’s say it is shooting at 940 ft.per second. This might not even be a fair question.
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Viewing 14 replies - 1 through 14 (of 14 total)
Mike where do you start??
Holy cow GKU brain over load.
Mike
~ GKU
~ GKU
A good range finder helps, Make sure it goes to at least 100 yards and further if your going to shoot further.
I got everything in my yard range finder memory, Back fence 48 yards, Bird feeder 38 yards, Telephone pole 50 yards to the top,
and on an on,,,
Mike
Yeah chairgun is great, if you plug in your data correct I find that it is pretty much dead on. I use it on my iPhone in the field all the time.
I love chair gun. The “kill zone” feature is particularly useful.
I set my KZ(killzone), to 1″
By setting it at one inch, this means your pellet will only be half an inch high, or low, at the distance span it shows you.
For example, here are my stats-
Cricket .25-
Velocity 920fps, 47.73fpe
JSB Kings 25,4gr
Scope height 2.3″
16x Magnification
Zero Range is 45 yards!
So with all these stats, and my KZ being 1″, with a 45yd zero, my shot will vertically be within 1/2″ up or down, between 14.4 to 51.1 yards!!!
Doing this virtually takes all calculation and guessing out of hunting as long as my target is with that yard range.
Once you set your KZ, I recommend 1″, all you have to do is toy with your zero range until you can find the longest spread of distance. I can squeeze out a little more range if I zero at 47 yards, but I keep it at 45 to be simple to remember. Once you find the longest KZ spread by tweaking the zero range, just zero your scope for that range. Awesomeness……
KGB, thanks for your reply, your information gave me a good platform to double check how i was figuring it. I downloaded chairgun today and it showed me that the pellet actually drops more than i initially thought. It is good information to have. Thanks again for sharing.
OK, my chairgun shows shooting at 940 fps, zero’d at 30 yds, with a scope height of 2.06, sight base 16 in., shooting 49.82 ft/lbs., using JSB Kings 25.40 with a BC of .036, that it will start dropping immediately. You will be 1.04 inches low at 50 yds.
If you Zero at 30 yds, that will be the peak of your arch so the pellet will be dropping at 33 yds.
If you were to zero at 50, then you would be 1 inch low at 59. It will be dropping even faster as the would be on the back side of the peak and it’s already on it’s way down if that makes any sense.
Thanks to all that replied, I will check out the website. I am in the same camp as Zonk. I figured it would shoot flat to 50 yards then start dropping. Maybe in the next few weekends I will get out and stretch the targets out farther than my back yard. Thanks again.
:4: ………..
I don’t have any of that fancy stuff, I was raised by using Kentucky windage. For me at 30 yards dead on POI changes around 50-55 yards.
:4: ………..
I agree go here,
http://www.hawkeoptics.com/chairgun.html#.UoGIdsrnb2K
But its not so simple , I find it very hard to use,, But I got an I phone that stumps me also. :confusedn: :confusedn:
Mike
Use the Hawke Chair Gun program it’s easy to use and it’s free 🙂
terryy,
I can’t help you but I can tell you where to go, in I kind way, try going to chair gun (google it). Different pellets have different BC and different scope/mounts will amount to different heights above the bore line so in using the ballistic tables and plugging in the needed information it will give you all you want to know. After you are familiar with the program you can become very efficient and put in different sight in distances to best your preferred needs. Not sure if I was any help but it might steer you in the right direction.
Cheers
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I start from the start and read everything,,, Until my brain starts hurting.
Mike