I've been working up loads in 180gr Scirocco II's for my .300 Win Mag. To put it bluntly, this has been by far the worst loading experience I've had. The groups vary from bad to really bad. Powders in various weights used so far are RL19, RL22 and IMR4350. Anybody have a recommendation, I'm about to give up on these. Meanwhile my first 3 rounds of 180gr Accubonds using RL19 shot just under an inch so I'm quite certain there's no issue with the rifle or scope.