I've used the 6.5 x 55 and the 6.5 x 284 to take about a dozen elk and witnessed maybe another half dozen taken with the 6.5 x 55. I have used the 130 vld, 130 accubond, 140 bt, 123 scenar, and 120 ttsx. Had great results with the 6.5 on elk. The 6.5s are more than adequate for the types and distances of shots I opt to take and kill very cleanly, at least compared to the other dozen chambering I've use to harvest elk. Headstamps don't limit the types of shots I take but ethics often do. The only 6.5 I caught was a 130 accubond in a wolf taken at about 30 yards.