Pre-fit barrel alignment

[Aftermath]

Yeah, if you don't typically zero for 300 meters, it kinda is

If you want to hit the paper at 100, do as I said. You should be looking through the barrel and seeing about a half inch under your point of aim in the scope. A 200 yard zero would be even closer and under your point of aim about a 1/4". 300 yard zero and you should be about a 1/2' high from point of aim in the scope.
I mean. you aren't hitting where you think you should now but think you are off to one side or the other. Aiming the scope at 25-27 yards and then looking through the barrel should tell you if you are off either side, not just above or below.
25 yards is close enough that you should be able to see your aiming spot with your naked eye through your barrel. Not much farther out and it becomes more difficult. Plus, it's a free method and doesn't rely on the misalignment of some bore sight device.
I have swapped to the cartridge lasers. It saves me time and ammo.

This works whether you start with looking through the scope first or the barrel first. In the case of actually using this method to get on paper, start with aiming through the bore and adjust your scope to the point of aim.

 

[memilanuk]

I've done something similar in the past, just usually @ 100yds. Using the right target, one that can be optically centered in the bore like a peep sight, usually gets the job done - the exception being days like last week where the conditions outside were crap. Usually I start with the collimator to at least get close-ish... though that clearly went off the rails, somewhere.

Guess I'll see if I can set something up in the back yard to where I can aim out the shop window without making the neighbors too nervous