I remember owning some 30 caliber old style Noslers in 150 or 165 grains and never had any luck getting them to shoot well. Last time I tired was about 5 years ago and finally just used them all for off hand practice.
Funny you mention "offhand". As I was typing my last post I was thinking (to myself) I shot my best offhand group with those bullets....Scares me to even say what that was...