I have used the crimp dies in several rifles that i couldn't get to shoot otherwise and got an improvement in them all. They were all auto's or levers or magazine rifles that had short magazines compared to how the barrel overall length was set.[mainly browning levers and autos] One 270 blr of a friends went from 4 inch groups at 100 to 1&1/2 just from crimping. I now crimp any rifle i can't get to shoot a reasonable group.
Fred
