Jeff, yes, I'm thinking maybe they were setting 0.0 at the 50 yard mark. Just a guess, but then all of these figures would be "-", which would seem to make sense.
Thanks again for the info.
Dadu
Dadu-
The "mid-range trajectory" data is an older way of describing bullet flight paths.
The numbers "1.2/100" indicates that if the rifle is sighted in so the bullets hit the aiming point at 100 yards, then the bullet will be 1.2 inches above the line of sight at 50 yards.
Likewise, for 6.3/200, the bullet will be 6.3 inches above the line of sight if the rifle is sighted to place the bullets at the point of aim at 200 yards. And similarly for "21.0/300", a bullet that hits point of aim at 300 yards will hit 21.0 inches above point of at at 150 yards.
What is missing for these estimates is the height of the sights above the bore. For the 25-20, which was usually furnished with open iron sights, presumably the calculations were made by assuming sights are about 0.75 inches above the bore.
If I've messed this up, the pros will be along soon to set things aright.
--Bob
