RickF you and I know the Roberts is not for erudite and sophisticated target shooters like yourself
It does everything wrong with the low BC bullets; doesn't fit actions precisely right,and I have no doubt a proper 6mm or 6.5 is a better mousetrap in may ways. The cartridge is for sentimental,clueless grunts like me who might have used it years past and killed a bunch of stuff with it.
But despite the drawbacks it kills well at moderate distances.
That day in Wyoming on the big pronghorn the wind was switching, he looked a long ways out,herding does,and I had no LRF's then so I had to peep through the 4X to get an idea of distance. I knew he was big and wished I had brought the 270 instead. But I held for 400 as he quartered "on" and the 100 gr Partition hit the point of his shoulder and angled back through the chest. He danced in a small circle and collapsed. I figured I could live with that.