The entire Marksman line is rated for .243 calibers or lower. The centerfire marksman’s will be parallax set at 100 yards, making them more suitable for centerfire range shooting. The rimfire Marksman’s will be parallax set to either 40 or 50 yards, making them more suitable for rimfire range shooting.

Yes, the rimfire scope is only parallax set at a smaller range, but can work on centerfire rifles up to .243 caliber for more commonly 50 to 100 yards.

The important thing to keep in mind for air rifles is that reticles should be etched glass. Any rifle scope with an etched glass reticle can be used on an air rifle. Because air rifles have a more forward momentum, as opposed to a backwards recoil, wire reticles have a chance to break on a high powered air rifle.

1.) My parallax dial numbers don’t match my actual yardage.

The side focus dial is directly affected by the positioning of the reticle focus. When the reticle focus is screwed all the way in, the parallax dial indicators will be most accurate. The more the reticle focus is screwed out, the less accurate the indicator ranges will be. These are meant to be a general guide,
and the side focus should be set according to the image you are seeing downrange, and not necessarily at the exact yardage you are shooting.

2.) I can't zero in my optic.

If you are having trouble sighting in a scope, be sure to double check the tightness of your rail and rings. Rings that are not torqued to the recommended inch/lbs, or rails with loose or missing screws, may be causing the optic to shift around in the assembly, making zeroing in impossible. If your scope has ran out of internal adjustment, the most likely cause is the rings or rail. If you run out of windage adjustment, try swapping your front and back rings, relocating them to the other side, or rotating one around and
leaving one in place. A tiny error in the machining of the rings can have drastic effects on the placement of the reticle. You shouldn’t have to adjust more than 10 MOA to zero in your windage. If you run out of elevation adjustment, you may need a different MOA rail. If you are using a 0 MOA rail, and need more room to adjust elevation, try a 20 MOA rail. The last thing to check before sending your scope in for warranty is your ammunition. An inconsistent box of ammunition is sometimes to blame for sighting in issues. Try using another bullet grain, or another brand of ammunition.

3.) I zeroed in my scope, but the next time I went out shooting the zero was off.

There are multiple things that can require a re-zeroing of your optic. These include: changing the ammunition you are shooting, recently clean vs unclean barrel, Shooting with a hot barrel versus a cold barrel, external weather conditions when shooting, the storing of the rifle and optic in between shooting, shooting with an oil wet versus oil dry barrel, etc. New barrels also require a period of “breaking in.” As copper fouling settles into the barrel, your bullet trajectory may shift over time.