Hornady ogives do seem to change from time to time. I've always had good luck just keeping the ogive to land distance the same. As a matter of fact I don't even keep my reloading records by OAl anymore. When they went to the different taper i always felt bad for beginning Reloaders because where they put the cannelure was just plain wrong......if people seated by the canelure i can only imagine how many people were jamming the rifling.