I'm a fan of Randolf Engineering glasses. Their frames are clearly of high quality. I've have the Ranger Sporter Rx for about 8-9 yrs now. I have prescription inserts and the clip-on in a "Color Mag" tint. They are dark enough to ease eye strain in bright sunny days and still allow for use to increase contrast on overcast days.

Their "Ranger" line is their shooting line. They've expanded their line to include several styles.
http://www.randolphusa.com/product-categories/ranger/