RealGun
Member
The reason an O-ring works is because there is slop. If you loosen the nut and wiggle the die back and forth, you will have experienced the "slop".An O-ring doesn't limit the travel (slop) in a thread "locking" situation. The O-ring is a cushion applying pressure to the threads and will keep the male threads snug up against the female threads. If there is any movement of the stem, "locked" with an O-ring it will be the same every time pressure is applied...