Gauntlet is it possible?

Hey guys it's probably just my guess, I just bought a guantlet in .22 sightted at 20 yards and at 50 yards it just have a drop of 1 3/8". I don't have a chrony, but the according to the chairgun app it's shooting the jsb 18 gr. At 870fps that's 30.2 fpe. Is it possible? 

I didn't do any modifications to it.

Thanks, Ruben

By the way at 50 yards it makes a hole thru a 1 1/4" thick piece of pine
 
Could depend on your scope height. I zero the .22 and .25 Crickets at 20 shooting at 885 the far zero is 45-46 yards the scope height is 2.35" using med mounts and the same scope. So unless your really close to the bore stoti is probably right with your fps. Think several youtube vids put the 177 at better than 900 fps with the 8 grain pellets. The.22 was shown to be lower with the 18 grain pellets. They sure look like a lot of bang for the buck.
 
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This is what chairgun show me.

At 20 yards is zero, (haven't checked my far zero) and my point of impact at 50 is around 1 3/8"

That's how I came out with those numbers