Federal XM193 is $2.99/box.
Theoretically you need the internet coupon and are limited to 20 boxes. But I went in to my nearest and took 20 boxes to the register. They rang at $2.99 without coupon when scanned. They didn't need the coupon, and when I asked if I could just get a case, 5 more boxes, they added five more on. Will a case scan at the lower amount? I don't know. But that was $80.27 out the door.
I got the Internet coupon by going to their site www.turnersoutdoorsman.com/and signing up. the sign-up section implies you get the weekly e-mails starting next week. But it then concludes by sending you to a page to print out the coupons for this week.
They are primarily in Southern California, and I don't know if they mail order.