Hello mate, yep, and another point as to using the 100 grn mono bullet in the 6,5 for deer instead of the 120s grns in lead, (which many people probably used to use for deer, when using a 6,5), is the speed bump.
Suddenly the 6.5s in cartridges, like the 6.5x55 or 6.5x57 or the creed, can shoot deer bullets at speeds previously achieved by the larger 30-06 derived cartridges, such as the 270 and 25-06. In turn those cartridges can almost push 100 grn bullets into magnum territory, speed wise. At least if you reload, or have the possibility of having someone reload for you.
So even for someone who believes in the speed kills principle, some of the smaller cartridges might these days do the sort of job that the 270 and 25-06 did. If that is what you want, of course.
why if i may ask?