The 6.5 creed and 7mm-08 are almost identical when it comes to down range energy. I currently shoot the 143 ELD-X out of my .260 Rem (6.5 Creed predecessor) and am very happy with it's accuracy. I haven't used it on any game yet however, as it is my long range steel ringer/varmint duster, and my back up rifle for deer and Elk. I know it's not the 120 grain bullet, but it seems that Hornady only makes a "hunting" bullet in that weight. Here is an actual real world review of that 143 ELD-X, hope it helps make your decision.... Also, since you're having a custom barrel made, why not have it threaded and put a muzzle brake on it for her.... Criterion barrels will do it all for you... Just sayin...

Edit: Hornady does make a 120 GMX (Solid copper) and a 120 SST... I believe both are considered "hunting" bullets??

http://panhandleprecision.com/hornad...rformance-test