Thanks blue.
I went out with the Ruger again. This time I started with a cold barrel and only shot 3 rounds. At 200 yards the first two were less than an inch apart, but the third went out an inch or more. I'm starting to think the thing likes to shoot only a couple rounds and hates being warm at all. I'm wondering if the barrel would respond to cryogenic treatment. OTOH, it doesn't take more than one shot to put game down so I'll prolly just leave it and go hunting.
