just picked up a .25-06 handi rifle today. i have done some reading on here, and this round seems to be pretty versatile. am i correct?? another question is, how easy is it to interchange barrels, or can you at all? i also purchased a 3x9-40 scope for it. mounting the scope i ran into a problem with scope hitting hamer and hitting the scope mounting rail. do i need to purchase taller rings for clearance or a different style rail? i am pretty excited about gettin it put together to do some shootin. this site is great, and full of knowledge. oh,, before i forget, how do you tell the difference between a sb1 or sb2. i have 2 letters in the ser #. they are hx. thanks, brian