i usually shoot all my deer (in a given year) with some form of factory bullet. here on the farm i get doe tags due to crop damage, so i can usually kill up to 25 deer. about 4 years ago i shot the core-lokt ultras. they worked just fine. 9 deer, all one shot kills. i will say the deer ran a bit farther after the shot, but found em' all dead within 50 yards. never found a bullet either, but all shots were broadside at usually no farther than 50-75 yards. i wouldn't hesitate to shoot them for elk, but i prefer partitions, so use them exclusively for elk. i don't see the ultras much anymore, but if i found them for 15.95 a box i'd certainly buy a stack of em'. ymmv.
