A lot of good information in this! I have been messing with this app for awhile but never really understood a bunch of the inputs. Thank you for this run down on it!! ❤
Excellent video. Thanks for taking the time to film and edit it and of course for positing it for our benefit. Keep up the good work! (Can you update it for the latest version?)-Migs
I’m interested in getting a true BC for 12ga slug with rifled barrel to get a Custom Dial made from Leupold. I thought it would be a neat trick in the field dialing the range. Any advice getting a true BC on a slug gun? for a po ole KY boy???? Super Nova, Crio barrel, and have 6 different slugs to try to see what the gun likes. May have to figure out my own BC because may not be on the box. So… true BC at shorter ranges.
Here are some numbers from one of my 6.5s on Applied Ballistics: Correct site height of 2.5: 700 yards, 0 degree shot angle: drop is 16.5 MOA 700 yards, 30 degree shot angle: drop is 13.8 MOA Default site height of 1.5: 700 yards, 0 degree shot angle is 17.4 MOA 700 yards, 30 degree shot angle is 14.6 MOA. So by not inputting correct SH, data corrections are off .75 MOA on level or 1 MOA on angled shots. My interpretation is that Clay's intention was to convey that sight height is important. Not necessarily more important on angle shots.
I can't show the math here, but the concept of it isn't too difficult. If you could somehow have your scope look directly down the bore of the barrel, the bullet would impact low depending on the distance. As soon as the projectile leaves the barrel gravity works and it begins to fall. Shoot a gun flat, and drop a book from the same height; The bullet and book hit the ground at the same time. However, with scopes being above the axis of the barrel, the projectile will cross the plane of the scope twice; once on the way up and once on the way down. This is why the popular 50/200 zero is possible. Generally, the lower the scope height the longer the Maximum Point Blank Range if all else is equal.
So sight height - half the diameter of your rear reticle + half diameter of rear space where bolt goes, plus total between top of that and bottom of rear reticle
No…. Simple measure…. Center of the bore… to center of the scope reticle…. Which is where the center of the windage cap is. Some people put a cleaning rod down the barrel and measure center of the windage dial, or center of the scope main tube, to center of the cleaning rod in the chamber window where the shells eject on bolt action guns. If you have a super large caliber…. Like a .45 or 50…. Put a brush that is for the size of your bore on the cleaning rod to center it I. The bore and prop it up to center bore on the rear and then measure center cleaning rod to center windage knob. It’s one simple measurement. The distance your sight reticle center is above the center of the rifle barrel bore. Middle of the scope cross hairs… to basically center primer of loaded bullet. If that makes more sense.
I see what you trying to say there… but you might screw that up trying to do it that way. And not all bolts are round. Bell on a scope has a thickness. Etc etc…. Simple is better
FYI Everyone... It's April 2022 and the ios AB Mobile app ver 2.4.20 is rife with catastrophic problems... the solver produces completely erroneous solutions if you input a negative density altitude. I emailed AB and they confirmed they know about it... it's been over 2months now and they still havent fixed it. No idea how many more months it will take for them to fix 2.4.20 with an update... so theres that to consider. Also the data backup feature is completely glitched and doesnt work. So... beware if you are at low altitude or low temperatures ios AB Mobile 2.4.20 will completely pooch your fire solution. They really need to fix this!
A lot of good information in this! I have been messing with this app for awhile but never really understood a bunch of the inputs. Thank you for this run down on it!! ❤
Thanks! GUI looks complicated but with a help of Your guide, I finally could use the app!
Excellent video. Thanks for taking the time to film and edit it and of course for positing it for our benefit. Keep up the good work! (Can you update it for the latest version?)-Migs
I’m interested in getting a true BC for 12ga slug with rifled barrel to get a Custom Dial made from Leupold. I thought it would be a neat trick in the field dialing the range. Any advice getting a true BC on a slug gun? for a po ole KY boy???? Super Nova, Crio barrel, and have 6 different slugs to try to see what the gun likes. May have to figure out my own BC because may not be on the box. So… true BC at shorter ranges.
Great video. I didn’t know that sight height error is extra important with angle shots. Can you please show the math behind that? BR Thomas.
Here are some numbers from one of my 6.5s on Applied Ballistics:
Correct site height of 2.5:
700 yards, 0 degree shot angle: drop is 16.5 MOA
700 yards, 30 degree shot angle: drop is 13.8 MOA
Default site height of 1.5:
700 yards, 0 degree shot angle is 17.4 MOA
700 yards, 30 degree shot angle is 14.6 MOA.
So by not inputting correct SH, data corrections are off .75 MOA on level or 1 MOA on angled shots.
My interpretation is that Clay's intention was to convey that sight height is important. Not necessarily more important on angle shots.
I can't show the math here, but the concept of it isn't too difficult.
If you could somehow have your scope look directly down the bore of the barrel, the bullet would impact low depending on the distance. As soon as the projectile leaves the barrel gravity works and it begins to fall. Shoot a gun flat, and drop a book from the same height; The bullet and book hit the ground at the same time. However, with scopes being above the axis of the barrel, the projectile will cross the plane of the scope twice; once on the way up and once on the way down. This is why the popular 50/200 zero is possible. Generally, the lower the scope height the longer the Maximum Point Blank Range if all else is equal.
Can you export the range card to the excel? For me it is very important to print and keep data on my forearm
Good video. But where is the next video?
Thanks for doing this, it is very useful. Best wishes. J.
My "Send Profiles" on iOS is greyed out even though my Kestrel 5700X is connected via Bluetooth. What could it be?
So sight height - half the diameter of your rear reticle + half diameter of rear space where bolt goes, plus total between top of that and bottom of rear reticle
No….
Simple measure…. Center of the bore… to center of the scope reticle…. Which is where the center of the windage cap is.
Some people put a cleaning rod down the barrel and measure center of the windage dial, or center of the scope main tube, to center of the cleaning rod in the chamber window where the shells eject on bolt action guns. If you have a super large caliber…. Like a .45 or 50…. Put a brush that is for the size of your bore on the cleaning rod to center it I. The bore and prop it up to center bore on the rear and then measure center cleaning rod to center windage knob. It’s one simple measurement.
The distance your sight reticle center is above the center of the rifle barrel bore. Middle of the scope cross hairs… to basically center primer of loaded bullet. If that makes more sense.
I see what you trying to say there… but you might screw that up trying to do it that way. And not all bolts are round. Bell on a scope has a thickness. Etc etc….
Simple is better
FYI Everyone... It's April 2022 and the ios AB Mobile app ver 2.4.20 is rife with catastrophic problems... the solver produces completely erroneous solutions if you input a negative density altitude. I emailed AB and they confirmed they know about it... it's been over 2months now and they still havent fixed it. No idea how many more months it will take for them to fix 2.4.20 with an update... so theres that to consider. Also the data backup feature is completely glitched and doesnt work. So... beware if you are at low altitude or low temperatures ios AB Mobile 2.4.20 will completely pooch your fire solution.
They really need to fix this!
Does this app have angular comp. ?
Yes sir
there is nothing wrong with grandpa 30-06 🙂
useless app.. only few choices of rifle scope,,, very expensive app also