Taper crimp - is this right

[Dangermouse]

Does this look like a taper crimp to you?
It looks very severe to me and nothing like the factory rounds,

DM




(9mm luger)

[dromia]

Way to much, the bullet looks bulged.

A taper crimp is used to take the flair of the case after bullet seating to allow chambering not to hold the bullet in place.

These newfangled rimless cartridges head space on the case mouth so if you taper crimp the case mouth flush with the bullet what does it head space on?

[Dangermouse]

I am glad you have said that, it looked very not right to me.

I followed the redding instructions, which are poorly written and required reading several times over.
Just getting ready to start 5 days back so will have another go next week,

DM

This is just a practise case and old pulled projectile, no primer or powder.

[phaedra1106]

I use the Lee factory crimp with enough crimp to put a slight indentation in non-cannelured bullets.

[toffe wrapper]

DM
You have come up with a new crimp we had roll & taper now we have wonder bra, tight round the waist with up top pushed up for posture.

Seriously way too much crimp. flare the case mouth just enough to allow bullet to just enter the case then use crimp to straighten the case and just squeeze the bullet. You should be able to feel the rim (no pun) which will head space on the chamber. If the bullets have copper plated heads they may not be as hard as FMJ so you may get the desired crimp with less effort.

TW

[NoEntry]

I use the Lee factory crimp with enough crimp to put a slight indentation in non-cannelured bullets.

Sounds like to much crimp to me.

I use very little, only just enough to reove the case flare really.

Mike

[phaedra1106]

Not for the 9mm SGC, with plated bullets it has to be a good solid crimp due to the huge amount of force from the bolt when it slams forwards, there's a lot of weight in it.

[NoEntry]

My loads work well enough in my SGC 9mm.
Just enough crimp to effectively straighten the case and remove the neck flare.
I have no problems.


Mike

[phaedra1106]

Are you using copper jacketed, copper plated/washed or lead?

[physeptone]

Not for the 9mm SGC, with plated bullets it has to be a good solid crimp due to the huge amount of force from the bolt when it slams forwards, there's a lot of weight in it.

If the cartridge headspaces off the mouth of the case surely any crimping will affect this.
If you use a gun with a 'heavy bolt' surely it risks driving the case mouth past the point in the chamber where it should come to a stop.
Sounds a risk of problems to me- mouth of case getting between bullet and end of chamber/beginning of barrel.....