I'm going to do what most people do and do the shooting part at a regular range and ski separately in winter.
So how do you re-create the cardio stress one would be under during cross-country skiing- while shooting; to "just" shooting at the range?
Just seems to me that whether it's skiing, or a cross-country run, not creating the same conditions of physical stress would be a waste of time. Just sayin... I can hit a minute of angle target at 600 yards when I'm prefectly controlling my hearbeat and breathing. If I went out, ran five miles then took that shot- I'm sure I couldn't hit the broad side of a barn.
Maybe a treadmill at the range...