"PistolPete"Yeh - to be clear - I'm not getting a 12ftlb rifle. I am in the market for something >40ftlbs @ .25. My thinking on this is that I want to be able to throw lead below the subsonic threshold with enough force to hit something good and dead at 50yds.
Glen & Frank - the FX's look nice. I especially like the Royale 300. I'm looking for something a bit more traditional and this may fit my purposes. As for weight, my Mauser is 7lbs + the Zeiss (+ >1lb) + whatever the mount weighs, so I actually wanted to mimic that weight. I'm not super concerned about getting a lightweight shooter. I'm not scared of lunking around a setup in the 9-10lb range, I'm a bit more concerned about length really, especially since I might want to get a silencer if the baffling isn't enough (like a 48'' Edgun Morana...you'd be knocking branches carrying that thing in a shoulder sling).
As for the fills - I'm definitely going to be getting a SCBA tank. I was thinking about getting a larger one and a smaller one, but I don't even know what "large" is for these purposes. Ideally, I'd have something I can clunk out to the shooting area (about 100meters from the house) and then a bigger bottle at the home. What sort of sizes do you guys use?