Steve,
yes it's a switch barrel. Only takes a few minutes to swap barrels.
I LOVE the .22BR! It's my favorite p-dog cartridge, bar none. My favorite all around varmint cartridge, for that matter. I've got two of them, and they get used more than all my other rifles combined during the summer months.
I've got a friend using a 6mm Dasher (blown out 6BR), and know a guy using a .22 Dasher. Neat cartridges, very. But seeing as how I already have the standard BR's and the .22-250AI's, there just isn't anything a Dasher can do that I don't already have covered with a lot less hassle. The guy I know with the .22 Dasher is only using 1 gr. less of the same powder to get the same velocity as I get with the .22-250AI (my barrel is 2" longer also). And he's pushing the ceiling of prudent pressure to do it - while the equivalent load in the .22-250AI is fairly pedestrian. Anyway, I DO think the blown out BR's are neat, very accurate and efficient. Just a bit of a hassle to form - especially the 6 (needs to be necked up, then back down to form a false shoulder for fireforming).
- DAA