Got this one Tuesday:

Rifle is a stock 16FLSS in 243 Win. Shooting 62g Varmint Grenades at 3700 fps. Had to lay prone in the iced over grass to conceal myself enough to start calling. Dog showed up in about 45 seconds so I didn't have to freeze for too long.

Bang/flop at 90 yards.
Got this one on Saturday:

Same rifle, same load but about 35 degrees warmer! Dog was coming in hard then stopped to look at about 150 yards. I started to let him come on in but just standing there made an awfully attractive target. Same result: bang/flop.
Killed another one Saturday in 24" tall love grass and completely lost him. Made the mistake of swinging over to another dog after the shot and lost track of where he went down. My partner also killed two on Saturday so we wound up with 4 on the day.