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Do small changes in elevation affect POI?

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PseudoSane:
I was messing around with my Avenger .22 with some JSB 15.89gr this weekend. I zeroed it at 30 yards (doing 850 fps), and noticed that when I switched to a target at 50 yards I had a 1 inch drop in POI. Would a 1 inch drop between 30 and 50 yards be expected? 

I would mention that I'm shooting down from my deck which is about 10 ft above the ground. Where the range is setup there is a slight increase in elevation so that the 30 yard target is about 2-3 feet lower than the 50 yard target. Could this slight increase in elevation in the 50 yard target account for the POI change? And, could the fact I'm shooting slightly angled down be contributing?  Thanks!

DMR214:
I have a 30 yard zero with the .25cal going 866fps /.046bc. At 50 yards It drops 1.6", when I shoot out the upstairs window at 50 yards there's no difference in hold. That's 15ft above the target.

Motorhead:
Yup .. tho exacts are pending speed your shooting at.

huntr:

--- Quote from: PseudoSane on April 16, 2022, 07:16:43 PM ---I was messing around with my Avenger .22 with some JSB 15.89gr this weekend. I zeroed it at 30 yards (doing 850 fps), and noticed that when I switched to a target at 50 yards I had a 1 inch drop in POI. Would a 1 inch drop between 30 and 50 yards be expected? 

I would mention that I'm shooting down from my deck which is about 10 ft above the ground. Where the range is setup there is a slight increase in elevation so that the 30 yard target is about 2-3 feet lower than the 50 yard target. Could this slight increase in elevation in the 50 yard target account for the POI change? And, could the fact I'm shooting slightly angled down be contributing?  Thanks!

--- End quote ---

Get some kind of airgun ballistic calculator app. ChairGun is one that is not too hard to use.

customcutter:
Absolutely, I remember years ago shooting archery, I could be zeroed at 20yds.  If I went up a tree stand 10-15 feet, I was no longer zeroed.  They actually made sighting pins that would swivel based on the angle you were shooting to compensate for the change.

As others have mentioned Ballistic Calculators can calculate the change for you.

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