Parallax should work. I've got a Hawke 3-12x44 SF. The parallax goes down below 10 yards, looks like 7 or so.

Yes I'll shoot the Crosman 14.3 as a baseline.

So I'll set up an indoor range at 13 yards. I had to order a lithium 9V battery for the chrono, so there might be a delay on that info, that will be an outdoors thing anyways, for the light..

Also, I pulled the iron sights off the gun. The rear sight was loose after every session, so I just pulled it, and the front sight. Then, I ordered a Air Venturi Crow Mag brake to put on the barrel. Looks like it is about 5 ounces that might help dampen harmonics a tad, and make a decent handle for cocking. It should be here Friday or Saturday, and then I'll get started.