It does say using a bullet travelling at 800mps or 2,600fps so whichever bullet you are using, as long as it has the same velocity, then use the table as shown.
Ok Lets have a go at explaining, when I have finished if anybodyt else can improve on it feel free to do so.
As has already been said most shots are taking when swinging through the target, like using a shotgun, however using this chart you can (in theory) hold forward of your quarry and shoot when it reached the point indicated in the chart.
Lets say the Boar is walking along at normal speed, the Chart reckons 5km/h similar to a mans average walking pace when going somewhere other than a stroll.
Lets say the Boar is at 40m then you would fire apx 10cm ahead, on the green spot.
If it was running at speed with dogs chasing it, say 40km/h, and still at 40m then you would fire apx just under 60cm ahead, on the red spot as indicated on the chart.
Lets say it was doing it's normal thing, running at 30km/h, having been chased by the dogs but is well ahead of them, and the distance from you is 80m then you would have to let fly apx 90cm ahead of it on the pink spot.
That is the best I can do to explain it but if anybody has any other interpretation of it please feel free to tear me to bits because it is over forty years since I went to a language school.
It is very much the same as clay shooting in that you follow through and fire ahead of the target.
I swing to catch the animal up and the speed of the animal will dictate how fast I swing but I keep going and as I pass the snout pull the trigger.
Obviously the speed I need to catch the animal up and pass it maintaining the same speed, will give me more lead ahead of the animal even tho I pull the trigger as I pass the snout.
Writing all this down is difficult as when I shoot at running boar I don't think about it, I just swing and fire, when and if I hit it is nearly always well forward and the pig goes down.
I did underestimate the distance and speed on one occasion and hit the poor pig in the back leg, fortunately for me my colleague further along the line shot and killed it. We didn't realise that I had hit it until we got it in the trailor.
I'm off to Croatia in three weeks time
I won't have much time to write about it as I will no sooner be back when I have to get ready to go out againI will look forward to hearing all about it.Not that I'm jealous at all have a good hunting tripJonathon