lrgrendel Wrote:Really good info.
Anyone know the formula for "mils"?
I take it you are working in all metric? Mils turrets, Mils reticle and measuring in metres on the ground?
If so, it is the simplicity of the decimal system. 1Mil approximately subtends 1metre at 1,000metres.
I say approximately because it depends on the convention you are using as to how many mils make up a full circle (NATO, Finland, USSR or Scope manufacturers' convention).
The real trigonometric-derived number is 6,283 mils make a full circle. NATO has gone to 6,400 to make it easy to calculate. My Silva compass displays 6,400Mils in the full circle. I understand scope manufacturers use the real number 6,283.
At 100M, dial up 10Mils and your reticle should be pointing 1 metre higher on the target. You don't have to fire any rounds if you have enough marks on the target to be able to identify where the reticle is pointing. 1 metre is about the height of Brian's board in the video.
One qualification to the video. Brian talks about loosening the scope ring and rotating the scope if your rounds fall left or right of the dialled-up group. This assumes the gun is level...or in other words, the barrel and scope mount are absolutely vertical. Your vertical tracking might be perfectly vertical to start with but on the occasion you shoot these groups the gun itself is canted...Just saying.
I remember printing out a similar tracking check as a utility of a ballistics program. Four or five A4 sheets that you print and tape together. They had increments large enough to see at 100yds through a scope. You dialled up and down your scope keeping your gun rested and still. Same check as Brian but just no shots are fired.
That said, I am going to try this out tomorrow at the range.
Good spot Nuggin, it's a helpful video and always good to check these things from time to time.