Cannelure for crimping

[mazama]

In previous thread person brought up cannelure and crimping,I have never crimped a rifle round in 45yrs of reloading,curious how many crimp-rifle,I crimp all pistol,but have never done rifle.

[Hilltop123]

I crimp all my ammo that's run through a semi auto.

[Stein]

I run mine through the Lee factory crimp die.  Honestly, I haven't ever done any tests to see if it does anything, but it's just one more pull of the lever.

[hunter399]

I crimp all my ammo that's run through a semi auto.

[jasnt]

I don’t crimp rifle

[Oh Mah]

I crimp all hunting loads because of all the bouncing around.I have had bullets walk out and have difficulty chambering the extended round.never noticed any accuracy diff. when loading just to go to the range.

[Fl0und3rz]

I run mine through the Lee factory crimp die.  Honestly, I haven't ever done any tests to see if it does anything, but it's just one more pull of the lever.

:Yeah:  I don't know if I've ever not crimped, except for dummy rounds.

[Igor]

I give my big-boomer revolver rounds (.44 mag, .45 Colt) a slight roll crimp.
I give my semi-auto handgun rounds a slight taper crimp.
My hunting rifle rounds don't get a crimp.  The long bearing-surface of the bullet keeps them
in place quite nicely.  I've never had one move.....even after being jostled around in my pack.

[Oh Mah]

  could be a diff. from needing to be annealed and not that caused the bullet to move i guess but knowing that it wont when crimped is nice insurance. 

[Fl0und3rz]

I do it mainly for hunting rounds, because they go into the magazine, into the chamber, out of the chamber, out of the magazine, over and over, over the course of the season.  I also seal the primer pockets and necks, because they are out in the elements, over and over.

I have just started to neck size some of my hunting rounds, so I may give some the no crimp treatment and see if it makes a difference.

[Magnum_Willys]

I go the other direction - anneal every round, low neck tension to get low speed variations but then I’ve never tested with crimping. 

[Oh Mah]

I go the other direction - anneal every round, low neck tension to get low speed variations but then I’ve never tested with crimping.

I am actually leaning towards doing exactly that.The .300 win mag loaded hot does a number on the brass in my opinion.

[Fl0und3rz]

IIRC, one of the selling points of the Lee neck sizing die was uniform neck tension.  I don't take accuracy efforts to the ludicrous levels with my hunting rounds (1" at 100 yards is acceptable for <400 yard rifle, for me).

I suspect I would not see much difference in accuracy over full-length sizing for these purposes, honestly, but I thought I would give it a go for informational purposes. 

I don't think your discussion is beyond the scope of the thread, so unless OP has objections, fire away. 

It's not as if most of us are going anywhere.

[BULLBLASTER]

I put a light crimp on my 375 HH rounds but nothing else.

[birddogdad]

I go the other direction - anneal every round, low neck tension to get low speed variations but then I’ve never tested with crimping.

every round? is there that much in deviation after a couple reloads? i have been wanting to know how often i should anneal my stuff.. i was going by range days with off speeds as time to heat em up