The 156 is a harder bullet. I wouldn't hesitate to run it. In my 6.5-300. I run the 124 hammers. It has been a lot of fun. Before hammers was the 127 lrx. Attached are pictures of the animals I took from 157 yards to 683. The antelope was at 683. The white tail buck was at 397, the elk was at 157. None of them took a step. I switched to hammers because Barnes didn't wanna take care of the customer and I wanted a bullet that shed fragmented and made some different wound channels. I will sash I'm not running the 124's at 3600. Im running them at 3400 which is still no slouch. I had them up over 3500 but es was ulgy and over 600 my accuracy was horrible.