chamfer every time?

[ttfreestyle]

is it necessary to chamfer the inside and outside of the necks every time the brass is resized???? (if no trimming is needed) Thanks

 

[sewwhat89]

I do every time out of habit. It seems to me the force needed to seat bullets is less when I have the inside chamfered. I would focus more on the inside than I do the outside.

 

[dmickey]

In forty years of reloading , I have never chamfered a case unless it is new or has been trimmed!

 

[Ackman]

No. Put a good inside chamfer on a new case, you don't have to do it again.

 

[olddog]

The reason for chamfering is so the bullet can be pressed in the neck without shaving the bullet. This chamfer is still there after firing.

I don't crimp any of my rifle loads so I can't speak to that, but I would think that that chamfer would still be there too.

One should be careful about over-chamfering as this can lead to a sharp edge which is not desirable.

 

[CanusLatransSnpr]

I learned something today ! I was of the impression that one had to chamfer inside and outside every time a piece of brass was loaded. You folks just shaved some time off of my reloading and I'm grateful!

MIke

 

[queen_stick]

I don't know because I've never done it, but if you chamfered each time you loaded a case, you would be left with very thin case mouths after 3 firings or so. There's a daily bulletin article on this site about excessive chamfering. (great pictures in the article too!) here's the link:

http://bulletin.accurateshooter.com/2009/10/dont-over-chamfer-your-necks-bullet-damage-can-result/

 

[fdshuster]

Standard procedure for me, with new brass is to inside taper neck ream using the K&M reamer, and for most of my brass, case stretching is non-existant, so they never have to be taper reamed again. With factory chambers in 22-250, 223, 308, etc., if they are trimmed back more than a few thousandths, then they get the taper reamer again.

 

[FroggyOne2]

I do every time i trim.

 

[camac]

I agree with these guys most of the time it is unnecessary, especially if you doi a good chamfer to start but there is a phenomenon that happens occasionally with some combinations that will cause the need for regular, light inside chamfering.
If you ever neck size down a caliber or two without an expander ball you will notice the mouth of the shell is "rolled" in. (Try it, stick a .224bush in 6mm die or similar.)
This happens to a lesser extent every time you neck size too, and is a physical property of sizing down. The sharper the shoulder on your neck bushings/sizing die and the bigger the difference between neck size of fireformed shell and sized neck, the more prominent. Inside chamfering in this case is recommended and won't cause case thinning but can cause shortening depending on extent. Once again, a slow taper into neck dies, minimises this.

 

[kitsap]

There are some very good descriptions and pictures on Varmint Al's web site on this topic.

See here about 1/8 th of the way down the page http://www.varmintal.com/arelo.htm

DougF

 

[clmayfield]

Two words: Giraud Trimmer.

 

[ttfreestyle]

thanks for all the replys. I am not usually a web person but this site is great. a wealth of information from so many. ;D thanks again.

 

[fdshuster]

Great article by VarmintAl: should be required reading for all those just getting started in reloading.

 

[petierney]

Second the "Giraud Trimmer".

 

[dmickey]

Second the "Giraud Trimmer".

Over priced, over kill!!