I use the 120 also and have had great success with them. I do not remember which brand it was, but one of them is a good bit harder than others. It did not expand very much on a white tail doe . I managed to get a 2nd round into her that stopped her. the 1st round exited with a small hole. 2nd one was a raking shot that broke the off side shoulder/leg. Both rounds hit lungs,but 2nd went thru heart then into shoulder. I do NOT believe it was a Sierra, maybe Speer.?? The gun was a 14" contender in 7-30. I have had good results in the 14" and 21" 7TC/U also with 120's.