I have a hillbilly theory that the ammount of jump or jam is determined by the type of powder used rather than the weight or profile of the bullet,,,,I have used the same bullet in various cal rifles and it seem the slower the powder being used the more jump it can tolerate,,,or like,,,for in stance a 175 SMK with 4895 may like to jam/touch in a .308 win,,,but in a 300 WSM that same bullet (both used with Krieger 10 twist bbls) and 4350 powder may like to jump ~.025",,,,I think it is dwell or burn time of the powder,,,,Roger