I have very limited expereince with solid copper bullets. Only one and only season. That is a 50 Cal. made by Barnes for use in muzzle loaders. I used it last season in my Savage 10-ML. It performed superbly at the range with a load I matched up with it and the rifle. It also was flawless in the field. I shot at and killed cleanly 7 white tail deer with this bullet. Closest shot was about 20-30 yards. Longest shot was about 185 yards. I have used lead core bullets, both factory loads and my hand loads, in my center fire rifles for decades. I have use about every brand of bullet out there at one time or another. My two favorites are the Nosler Partition and Sierra Game King. I cannot imagine any advantage a that solid copper would have over either of these for what I normally hunt ... white tail deer, wild hogs and occasionally mule deer.