Most of my experience is with the XLC's and triple shocks. However I got a box of 30 cal 165gr MRX. My 30-378 Wby (Sako TRGS) shoots them @ 3650 fps.(110 gr RL22 but please start 10 gr lower and work up) I have another box ordered from Midway USA. (I use 120 gr RL25 for the 130gr XLC's @ 3980 fps My main whitetail old load) When I shoot these Mrx's into soaked but drip dry phone books they do not lose the petals, open nearly perfectly even when shooting at an angle. When I shot it into an 8" oak log it lost the petals, had almost 1/2 inch frontal area and went out the other side. I dug it from the ground and it weighed 127gr. I've killed a coyote and a whitetail with the MRX 165 & 30-378 Wby. Obviously I didn't find the one from the coyote. On the whitetail it went through both front shoulders and was caught on the far side hide. (430 yards) and he actually ran 20 yards with the heart and lungs blown apart and both shoulders shattered. Weight 157gr diam .673" across the petals. I haven't recovered any (X bullets) that had petals blown off on whitetail. Actually I have very few that didn't go out the other side even from my 270 win and 6mm (only one killed with the 6 but who knows how many the 270 has dropped). I also load for my buddies 300 Wby but don't thinkwe've found a bullet in a deer from it. (I load for a couple 06's and a 7mm rem mag but use the Lazzeroni 120 gr 3800+fps for the 7 but that is another story) I guess the most amazing thing is nearly all deer only go 3 feet after impact and you don't get lead poisoning. Back when I was shooting Bal tips all I did was track wounded deer and we would recover the boattail base (and bullet dust). I have a video of an entrance hole 6 inches in diam from the bal tip (tracked him 1/4 mile before shooting him again) Also these MRX's seem to want more powder in the larger cases before you see pressure. When you see pressure you are a hundred fps faster than you imagined possible! If you want to keep your tracking skills shoot the other bullets. If you want to pick up your deer where you shot him, shoot Barnes X Bullets. By the way I am Very picky and very hard to please. But that is my experiences with them. Aren't you sorry you asked? (Yes I used to shoot partitions and black talons too)