Put the scope on and ramped up the loads to 20gn of Trailboss (405gn Westcastings, Win cases and CCI LR magnum primers) - for approx. 1000fps.

They shoot 1-2MOA at 50yards but open up to 4MOA at 100yards - still good for mucking around with. Half of the rounds that I fire you can hear that the projectiles are not fully stablised - I guess that would explain the worsening grouping as the range increases. All of the holes in the target look to be round though - I'll have to "guage" them with a projectile to see if in fact they are.

I'll be sticking with Trailboss from now on, before I do any damage with the other powders. AR2205 and AR2207 give slight hangfires. I also tried reduced loads with AR2206H and got rid of the hangfies but unburnt powder in the barrel and very sooty cases. AR2208 was worse - more unburnt powder and more soot on the cases, and also a complete ignition failure and another stuck projectile.