For my lightweight rifle, a Sako A7 ss, the factory Hornady 139gr GMX Superformance shoots so well I have no motivation to look further. When I was trying various factory loads to see what the little A7 liked, I shot a quick 3 shot 1/2" group at 200 yards and decided I was done and bought a bunch. The GMX is super tough. I took a buck quartering toward nearly straight on and it broke through 7 or 8 ribs and stopped just under the hide on the far side. The bullet was expanded toward the front, but still at close to 100% retained weight.