Don't listen.
As I have a couple of rifles here to sight in I guess I will bore sight onto paper at 100m, hash out a rough trajectory and then shoot a couple of 200m and 300m targets and see what it all looks like. Been a while since I did this without clicky dially scopes that need 2 rounds to sight in.
As long as you know where everything is going out to 200m, no need to worry too much. Further than that, then you need to worry.
Bookmarks