Re: bullet drop and scope leveling
Bart, I believe you. I also believe either some minor wind or a SLIGHTLY canted sight or both cancelled out need for correction for this drift. I have some rifle/load combos that drift about 3" at 1K and others that drift over 10" at sea level in sub zero temps. At 6000' in 60 degree air when I am sheep hunting this drift is reduced to some degree but for my rigs and loads I still correct for it past 600 yards.
If you have a proper stability factor and shorter time of flight such as will be seen at 5000' and with an over 3000 FPS MV this drift will be cut down quite a bit. That still doesnt negate the fact that <font color="red"> others </font> wont see it. It is going to depend on how the equipment is set up, stability factor based on twist, velocity bullet dimensions and air density. Also air density's effect on the overall flight and its effect on flight time. If you dont see it then there is obviously no need to correct for it. Some will some wont. If it happens the only 2 thing you can do is add or subtract its value from the wind at hand or cant the scope to the left a fraction of a degree for a right handed twist barrel and correct for raw windage.
Please understand I am not arguing with you. I know that spin drift doesnt always show up for 1 reason or another as it didnt in your case. The point I am trying to make is that whether or not a shooter "sees" it or not for various reasons that cancel the need for correction, it still happens and in other cases and circumstances other shooters will see it show up and have to correct for it.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.