[PEC-Memphis]

[QUOTE="9x45, post: 25007257, member: 19"]In a pistol, no. And it's not really a crimp at all, but rather a de-bell step which is just enough to take the bell off from the powder thru die. The crimp does not hold the bullet in place, it's the interference fit between the bullet OD and the case ID. Over crimping can lead to bullet setback.[/QUOTE]

As a general statement, this is not correct. It is true for some calibers, and not true for others - like .38, .357, .41 & .44 - there are probably others, but these are just one calibers I've roll crimped.

And even a taper crimp provides the interference fit to "hold" the bullet on a case that has been fired. Every try seating a bullet in a fired case that hasn't been resized or belled? It doesn't fit the same as with a taper crimp.

 

[PEC-Memphis]

For semi auto cases, it is TRUE.

The above is correct, but that is not what you originally wrote.

Putting a bullet in a fired (un-sized) case makes no sense.

It given to show that sizing and the taper crimp provides the interference fit - not as a reloading practice.

 

[PEC-Memphis]

This is the reloading sub-forum, not "general glocking".