I have hunted both elk and mule deer with a T/C Contender in .357 Herrett and 7-30 Waters and have had a lot of fun doing it. The longest shot that I have taken was on a 3x4 mule deer with the 7-30 Waters with a 120 grain bullet at 2900 fps and he droped in his tracks. One of the elk that I took with the .357 Herrett droped in her tracks at a little over 100 yards. I have also taken two bull elk with the Herrett with no problems and one with the Waters witch took a follow up shot but it really wasn't necessary.
So if your friend is hunting with a .308 in one I would tell him not to wait until the last day but to start out from the begining with it and enjoy it.
Jim Zumbo, Craig Boddington, Ron Spomer and Wayne Van Zwoll are all solid contributers to the modern hunting literature. Through their gifts (both hunting and writing) they make us better hunters. Whether it is letting us learn from their mistakes or by teaching us new techniques,they help us harvest more game. But I suggest looking to the oldies, the fathers of the outdoor writing craft, to learn tricks that you might have not used.
I chose to shoot the 270 winchester because I grew up...