Let me try and put your concerns to rest on the SMKs. I've killed many big whitetails with the 142 SMK. They dropped in their tracks. Shot placement remember. I understand anyone's concerns using match bullets and I won't try and convince anyone to use them. This is only a reassuring comment that they do kill very well.So I'm running a Cooper 92 in 6.5x284 with the 1:8 twist.
I found the 124 Hammer hunters to be great.
I also had great results with the Sierra Match Kings, but was concerned as I plan to hunt and the SMK's aren't a hunting bullets.
I just shot this yesterday...