i just bought my second 4200 6x24x40. i really like these scopes.i just mounted it this week on a lefthanded 788rem in 6mm. i'm planning on stretching it out to 500yds this week. its a heavy barrel 1-12twist and is shooting the 70gn nosler varmagedon very well at 100yds. i also have a b&l 3000 5x15x50 that is a nice scope.