Had one of the Heavy varmit laminated .223's and a Laminated mountain rifle in .260 with j-locks. They both shot very well, the .223 especially, just like Mule Deer's. Changed out the springs and bolt shrouds on both, still shot the same. On the other hand I do know of a few that didn't shoot well until the wiggly jammed up firing spring was changed. Some of those springs were really bound up, some weren't so bad. Luck of the draw.
