I’m trying to get my head round this business of how far a bullet should be away from the start of the lands known as “jump” or “free space” ? ).

I’m using a .22 Hornet and according to some info I’ve read this should be fairly short – no more than 0.050” for preference. However, I have measured the distance to where the bullet contacts the lands, 1.592”. On a completed round the length to the start of the straight section of the bullet (where it will contact he lands) is 1.400”. This gives a distance of 0.19” “jump”, which seems very long. It will be even more with factory rounds as they are considerably shorter than my hand loaded ones.

Have I got this right and does it make much difference?