Originally Posted by
1944P
I just talked to a CCI specialist and he informed me they do use a taper crimp on the 45acp ammo. The particulars are proprietary and he would say no more except that the ammo has to meet 'push/pull' specs.
That makes sense as there are only three choices:
• Use a roll crimp die (no good as CCI's 45Auto bullets have no crimping groove)
• Bell the case mouth juust barely enough so seating the bullet stretches out the case behind the bell and eliminate the residual bell or case mouth flare (not likely in a commercial facility where the risk of crinkling the case mouth must be avoided)
• Use a taper crimp die just like we do (well, not me as I use a Lee CFC die with the lower carbide sizing ring removed)
Thus, I will continue to load with a taper crimp, not into the bullet, as I have done for thousands and thousands of rounds.
Not into the bullet? Good! I was under the impression you were using that Bullseye shooters method of crimping as much as 0.0015" beyond simply deflaring.
Sorry for any misunderstanding.
Back in Post #7 when saying "For maximum case grip and minimum setback with any type of bullet, the ideal is to flare the case mouth juuust enough so (1) the bullet can be seated without catching and wrinkling the case mouth and (2) the remaining case mouth flare, if any, allows the cartridge to be reliably fed (SAAMI max is 0.473" diameter)." I should have called it an impractical ideal for the handloader because after trying it for a while I found it made for very tedious lead bullet seating on a single stage press. There was virtually no margin for error when placing the bullet atop the case before seating it.
Sorry if you thought I was recommending that as a standard procedure. It does, however, result in maximum case grip on the bullet (round is complete just after seating, with no fiddling needed with the case mouth and a finished case mouth OD of 0.473" or less). FWIW, for reloading thin-walled brass I even got a special 0.453" ID die for my Lyman sizer/lubricator. The bigger bullet helps some in compensating for the thinner case wall and thus larger case ID after resizing the case.
Q: Does your shooting buddy having the kaboom use a Lee Carbide Factory Crimp die?
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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