What kind of pellets are you using, enipla? Here’s a list of ballistic coefficients the people at HardAir Magazine put together for typical air rifle pellets. Since for speeds 800-1100 fps the G1 ballistics model is close enough to the GA model HardAir used, I can plug the HardAir numbers into a free ballistics calculator like the one at JBM Ballistics, and see what wind etc are likely to do to the trajectory.

I’m going to go down memory lane with my old airgun experience, and assume you used something like H&N flat-nose pellets. They make a “Sport” model in .22. The stats for it, per HA Mag, are: Weight, 13.73 (grains, though it’s not explicitly listed in the chart); Diameter, 5.50 MM (which makes my teeth itch. Pick one unit system or the other.); BC (GA) 0.011 @911 FPS.

Let’s plug that in. I know you’re at altitude, but I forget how high. Is 5,000 feet close enough? STP otherwise. 10 MPH wind, full value. Zeroed for 10 yds, with a 1.5 inch scope height and I ran it out to 60 yds, using 3 yd increments. 1000 FPS muzzle velocity.

Doing all that, I get, at 33 yds (~100 ft.), a drop of +1.7 inches, and a windage of 4.1 inches. About half an inch per MPH of full value wind. Which is a LOT larger than it would be in centerfire rifle land. Do you have a Kestrel or other anemometer?

Making the MV 800 FPS instead, keeping everything else the same, and I know the BC changes with velocity, bear with me, and we get: +0.9 drop and 3.9 inches of windage. So leaving everything else the same, the group should shift a quarter of an inch down wind, and 0.8 inch lower. Assuming a 10 MPH constant wind.

I can’t tell the difference between 2-3 MPH just by feel, and at that range, it’ll make a difference. Thanks, **am77494**, ignorance fought.

For the Litz article, he mentions that gyroscopic drift is about 8-9 inches at 1000 yds. I doubt it’s what’s causing your drift, but I don’t know. Coriolis is about 2-3 inches at 1000 yds. They stack in the N. Hemisphere for most rifling twists. (RH)

EDIT: I’d always thought that free-floating barrels were the way to go for best accuracy? So what you’re describing enipla, sounds like a desired configuration. I was always taught to rest the rifle fore end on the front bag, not the barrel. So that sounds good too.