Chamfer and deburring

No need to deburr unless you made a burr, by trimming.

If you chamfered sufficiently last time you deburred, you shouldn't need to do it again until you trim, but sometimes I give it a gentle touch with a VLD chamfer tool just to clean it up.

I check the overall length, and if the don't need trimming it's really quick to take a look at the edge and chamfer if necessary. A sharp edge on the inside will want to shave the bullet when you seat it.

Have a blessed day,

Leon

At times, if I run my brass through my rotary tumbler for a long time the case mouths get peened and shave bullet as they are seated. A quick chamfer cures that.

But generally not necessary every time.

Same as Walkalong. Only time I do it.

Most of my rifle bullets are boat tails so unless I have a burr I don’t chamfer or debur unless I trim the case.

Every piece of rifle brass goes through the Giraud ( one step trim / outer chamfer / inner chamfer) and gets whatever trim and chamfer it needs. Some need more, some need less, some just get kissed - but they all go through the same process.

If I'm seating flat base bullets I give a quick chamfer and deburr to aid in seating. If seating boat tail bullets it isn't usually necessary.

I do every time with rifle cases, mostly because of tumbling cases to clean them dings up the mouths of the cases. After trimming is a must. After tumbling with me it's inside only.
I mostly use an ultra sonic to clean but I tumble after drying to get the tarnish from my drying process off.

Walkalong said:

Y'all tumbling your cases with rocks?

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LOL! No, just use a dry rotary tumbler most of the time. I built it back in the early 1990's and it can be a little hard on case mouths if I put to many in there at a time.

I'm sure your using a vibratory tumbler as I should be, for post tumbling.

I'm also in the chamfer/deburr only after trimming camp. Generally, resizing and tumbling has no effect on the prep of the case mouth.

New cases need to chamfered and deburred as the case mouths have a various level of prep as they come from the factory.