Do you have any tips for getting one of these to shoot well? I've had the trigger worked on by Niel Jones (BIG improvement). My best load so far shoots 1 3/4 - 2 1/2 inch 4 shot groups at 100 yards with Hornady 200 grain SP, W 748 powder and Remington Magnum Large rifle primers. The groups usually have one flier that opens it up. Thanks in advance.