Re: Scope level?
what has worked for me:
1. eyeball it, switch shouldering the rifle so it looks level both ways
2. when satisfied, put a small level on the flat part of the receiver (if you can find a spot or rig a level to a flat piece of steel that you KNOW is actually flat) this will level the rifle, which is the foundation of this.
3. a little ways down range post a paper and make a large + (cross) on it using a level both horizontal and vertical.
4. center the cross hairs on the target (which is level) while making sure the rifle stays level, thus making the crosshairs level. go up and down, left and right the rifle while keeping it level to ensure the superimposing of the crosshairs with the + on the paper, or you can dow it with the elevation / windage
adjustments on the scope.
5. you can level the scope an give it a quick boresighting at the same time from the comfort of your back porch
i like to use the feeler gauge method also, but sometimes feel that if i don't get it right when i tighten down the optic, it may bow / bend the scope when it doesn't need that extra stress
putting a level on the turret works to some extent, but i know of many turrets that sat cocked or may not be perfectly aligned with the crosshairs inside (both cheap and expensive scopes)
remember you want to calibrate the scope to the rifle, not calibrate the "scope to the scope". when you put the level on the turret, your calibrating the levelness of the crosshairs to the levelness of the scope features, and isn't calibrating to the center on the bore and levelness of the rifle. putting a level on the turret also doesn't take into account the rings or bases, although rare, being a little off level.
