I think you are referring to this one, but I don't seem to be able to make it bigger.
That is the one,it's a good eye opener.
400 yards a gimmee?
Where exactly do you aim for a 400 yard shot?
What if its blowing 10MPH...or is that 17mph?
What if the shot is a steep down angle? How steep? Where do you aim at a 400 yard moose with a 18% slope? How do you measure slope on your garden variety bolt action rifle?
What if you just cleaned your rifle barrel?
What if it's 20 below zero? Do you aim somewhere else?
Where do I hold at 400 yards?
With my 7mmstw sighted in 2-3/4"high at 100 yards,the point of impact is 6" low at 400 yards,so I am still holding well onto the animal.
What if there is an 18% slope?
Given that the point of impact with my load is about 1" high at 300 yards,and that the difference in point of impact only changes 5" from 300 yards to 400 yards,a range error of even 50 yards will only result in the point of impact being a couple of inches out,which means very little on a moose.That 18% grade is totally insignificant with the rifle and load that I am using for an example,so I don't need to be able to measure slope.
What about a clean barrel?
I have checked the zero with a clean barrel,and with the rifle in question,and it will shoot the first three rounds out of a clean barrel into 1/2",as will most of my rifles,so no compensation required for a clean barrel.
How about -20?
As for -20,the point of impact with my load changes by less than 1" at 400 yards,after the gun is sighted in at around 0 degrees to +5 degrees.I purposely sight in at this temperature to minimize the effect of changes of temperature.
That leaves only the wind drift.The wind drift with a 10mph wind is around 9" at 400 yards for my load.If I misjudge the wind by 7mph,My shot would be out less than 7" worst case scenario with a 90 degree wind.With a quartering wind it would be less,depending on the angle.If the wind feels to strong or too variable,I don't try the shot


















































