I know this is an older thread, but time has passed with some of these bullets, and I have managed some paper, sand bag and game testing that I believe is relevant to help answer some questions. Firstly, Fusions and Deepcurls. I have shot these both to some extent in three cartridges now and have to say it is one of the most consistently accurate hunting bullets I have ever played with. I have literally shot over 200 130gr Fusion Factory rounds through 4 different .270 WCFs and its boring. 3/4-1" three shot triangles the norm. One rebarreled Remington (used a take off triangle barrel onto a browns precision stocked 30-06 that was shot out) shot quite a few 1/2 MOA groups at 200yds. That load killed a 48" Canadian moose for me 2 years ago.
The .300 WSM in dealt with for a friend was a consistent 3/4 MOA gun after I bedded and free floated his featherweight stock. I bought two boxes of 180gr Fusions and used one box verifying impacts with his Burris FFII. My group at 300 was 2 1/4" high for the reticle junction. Bingo. It's slayed and elk, two mule deer and a Saskatchewan whitetail. It broke the shoulders on the 6 point bull at 150ish yards as I recall too.
The .280AI I have loves the 160gr Deepcurls over 60.5gr of RL22. It clocks 3030fps with very little deviation (like 5-7 fps which is unusual for RL22). I have shot roughly 40 at paper to discover drops out to 400, and the BC is pretty close to advertised. I've shot 1/2MOA groups with the 2.5-8 out to 300yds (I can shoot that tight at 400 with 8x I guess :))
I then used this load on my biggest black bear (he's a pig!). He was facing me, slightly quartering to his right and I planted it through his shoulder. It smashed that shoulder, 4" of spine and ended up stopping just ahead of the offside hind in the backstrap. Over 3 feet of penetration through heavy bone and the recovered bullet looked to have 50-60% of its weight and my leather man said .5" expansion. The impact was 212yds. I'm 6'4" and 240lbs for reference.
This performance gives me the confidence to say that it is the best bullet for the dollar spent on the market. Understanding bonding and such in the manner that John explained it in this article is required to make a confident decision on what you want to shoot at what.