Witness .45 acp or look what followed me home from the Gunshow

[DomMega]

Pasadena gun show always has had some pretty nice Kimbers and such every time I go. I don't always like where I have to go to pick up purchased firearms, last time it was Whittier but whatever. Looks like a nice piece though, hope you enjoy it, can't say I own one or know much about them.

One thing I do love about the pasadena/glendale gun show is the jerky. THey always have the best stuff.

 

[wally]

Hmmm..... this gun show was in Pasadena, Tx. I see you're not from around here

Its one of our smaller shows, but there were lots of nice Kimbers there too.

--wally.

 

[CZF]

Is it true that the TAPER CRIMP will increase pressures, so you must back off on a load if you use the taper crimp die?

Seems silly, as you really can't tell how much to back off.

 

[wally]

Is it true that the TAPER CRIMP will increase pressures, so you must back off on a load if you use the taper crimp die?

This is better asked on the reloading forum, but bullet setback from inadequate crimp is much more to worry about as a cause of abnormally increased pressures compared to over crimping.

Generally I find that a little extra crimp on some loads makes the powder "burn cleaner" and not leave unburned flakes on the bench in front of me. So I'd guess its not that it increases pressures, but prevents the decreased pressure from poor burning with a too light a crimp that is still heavy enough to not allow bullet setback -- this will vary with the gun as some feed paths are more prone to causing set back than others, factory ammo (and my reloads) are set for the worst case. But possible setback is why you should not repeatedly re-chamber the same round when loading and unloading

Reloading is pretty non-linear. When in doubt reduce your charge weights 5-10% and try it, then work back up if things look OK in your initial tests.

--wally.