• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

Do you chamfer and deburr untrimmed brass?

Lightly, every reloading, just before expanding with the 21century expander mandrel, and a real light follow up before lubing the case neck. I use a nonaggressive Lee Thimble chamfer and Deburring tool. I want a light chamfer. Not some thing that I can shave with.
Other, than it helps to prevent you from shaving the FMJ or the lead off the the side of the bullet, It also helps to prevent the case neck from splitting. A lot of time a Micro split can start at the very end of the case neck mouth. Chamfering and Deburring will remove the little fractures in the case mouth that will grow into a split case neck. I believe you should chamfer and deburr every case before you seat a bullet. Just Me.:)
 
I have chamfered inside and out every time on my rifle rounds . Using a slite bell on pistol rounds I'm not chamfering. Does anyone have problems with the I pad changing words. Had to go back and correct.
 
Last edited:
To me deburring is a one time only operation to deburr the primer flash hole. There may or may not be a burr there so the lightest touch once is all that's needed. I'm very cautious and light handed with deburring as I do not want to change that angle of the flash hole. Done once.... there is no burr coming back.
Chamfering is done to the case neck's opening. If you have to trim to you'll have to chamfer. Tumbling could cause slight dings on the neck mouth so chamfering is needed.
Maybe the terminology has changed and I didn't get the message.
 
M61
I use a drill bit to make all my 308 cases the same size some bands have a smaller flash hold for some reason , then I deburr also uniform
once as you mentioned. Pistol I'm not so picky , maybe if I could shoot tight groups with a hangum l might go the distance. As long as I can hit a basketball at 30 yards I'm happy.
Chris
 
After scratching my FL dies and having them refurbished by RCBS (for free thanks to their outstanding customer service), I always chamfer new cases BEFORE sizing to remove the edges on some new cases that can break off and create brass particles in the die.

After that, I only chamfer after trimming.
 
Much what the title says. If you don't need to trim after sizing, do you bother deburring and chamferring?
The previous deburr and chamfer seems to still be there, so no not every reload.

I only deburr and chamfer after a trim or with cheap new brass.
 
I have chamfered inside and out every time on my rifle rounds . Using a slite bell on pistol rounds I'm not chamfering. Does anyone have problems with the I pad changing words. Had to go back and correct.
I have noticed the spell checkers in all of the platforms over the last three weeks causing issues. It was brought up yesterday morning in a nation wide Conference call. Suggesting a glitch in the latest updates. The court is still out on that one, as of this moment.
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
164,644
Messages
2,181,860
Members
78,450
Latest member
BurningCordite
Back
Top