Unless there has been some change to the way the Lee Carbide Factory Crimp Die for the 45 Auto / 45 ACP is manufactured, it cannot produce a roll crimp. That's because neither the lower carbide sizing ring nor the upper adjustable crimping sleeve has enough taper. My best measure of their included tapers are about 4° for the lower carbide sizing ring and about 12° for the upper taper crimp sleeve. As can be seen in the lower image in Post #6, the roll crimp is more of an abrupt step than a taper.
As previously stated, if you give the case mouth a minimum amount of flare with a 2½" long #8 taper pin - just enough so the bullet can be carefully seated without crinkling the case mouth - seating the bullet will produce a finished round with the case mouth snug against the bullet with no need for a crimping die. How do I know? Simply because I've done it.
How do I know so much about the Lee Carbide Factory Crimp Die? I've bought 3 of them over the years. And I'm quite proficient at measuring things.
You're way overthinking this. Next thing you know someone will convince you to buy a reloading press!
Lastly: this is just me, but I don't believe much of anything I read from Lee Precision.
When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. [Lord Kelvin]
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