There has always been considerable confusion on the part of many hunters and handloaders on the velocity and placement limitations of cup-and-core bullets on big game, which started almost immediately after practical smokeless rifle powders appeared in the 1880's. This obviously continues to this day, and obviously always will.
But there's something else going on here, which is also common and apparently always will be. Many hunters also assume that because ONE bullet of a certain brand acts in a certain way, then ALL bullets of the same brand will as well. Have heard this not just about cup-and-cores but premium bullets as well. Most hunting bullet companies adjust the design of their bullets depending on what size of game a hunter might use them on. In cup-and-cores the adjustments can include jacket thickness (often the only design feature many hunters consider, if they even consider it at all) and core hardness. Which is exactly not all Sierra bullets work the same way on big game, just as not all Barnes, Nosler or Swift bullets work exactly the same way.
