Terry -
Howdy !
The " blue haze " conditions and convective activity North Central Indiana is capable of, are certainly a real challenge.... make you " squint like Clint".
One off-the-wall thing you might try ( if you can stand it ) is: shoot while wearing one of the more exotic shades of shooting glasses.
I've heard yellow helps . I've read vermillion is the way to go.
For my circumstance ( and I lived 55yr+ in NE Indiana ) " ICONEL Mirrors " seemed to cut-out the UV component from the haze, which Indiana presents in varying shades of a delighful blue... to a debilitating
brilliant bright whitish/gray. As with mirage, you're fighting an unfavorable inter-action of temp ( ground and air ) and ambient humidity; often w/o benefit of a clearing breeze.
With good quality glasses, it won't necessarily be a cheap option, but... if you're gonna be wearing range safety glasses anywayz ....
Just a thought.
Regards,
.357Mag