Thread: 1-4 power scope advice needed

Hi Paul,

Thanks. Yes, I should have specified that I was referring to sight above bore height. It is actually more precise to discuss parallax error as a result of different causes.

"Sight height above the bore" introduces one form of "parallax error" or parallel axis error. This form of parallax error is common to all sight types, optic and iron, and arguably the more significant one as it cannot be cancelled out by using a correct viewing angle. It can only be reduced by getting whatever sight you have as close as possible to the bore.

Parralax from viewing angle error is incidentally a non-issue with rear diopter ring iron sights.

Different story with open iron sights where viewing angle error (thus improperly aligning notch and post) introduces horizontal and/or vertical parallax error from the bore.

The only ZERO parallax free sighting method is boresighting, for close up shooting, but it is quite slow. (-:

I would be interested in hearing a good reason why SlowElliott, who presumably hunts medium sized game such as deer, goats, feral sheep etc. when bush hunting, should bother forking out for a scope given his <100m requirements?