I also use a .243 shooting 100 gr. for deer. When accurately placed in the boiler room, this combination works exceptionaly well. IMO, this is a perfect recipie for mule deer and antelope success.
And to Led and Caveman, good to see some other Zonies on the board. I lived in Mesa for almost 20 yrs., but I currently live in the dreary little village of Winslow. Do either of you guys belong to the AZOD or AZSJ forums?
Here's a couple of pic's of a nice 29 7/8 in. muley I took in Coconino County. B&C net score: 170 0/8. Not quite a Kaibab buck, but awfully nice none-the-less!!