I need to do some reading on the subject I think. I didn't realize that a 444 will need special steps such as expanding and crimping. I never dealt with that before.
If using a single shot the crimping wouldn't be necessary. In a tube fed lever action the bullets can move in the case mouth because of heavy recoil, so a crimp is desirable. The flaring of the neck helps seat the bullet without causing the neck to buckle or shaving material from the bullet. That is why straight walled cartridges whether rifle or pistol have an extra die. A simple and painless process that just adds one more step to loading. The seating die can be set to crimp as it seats the bullet.