Author Topic: Deburring brass (Read 865 times)

bigjeepman · « **on:** May 14, 2004, 02:34:20 PM »

Which do you all do first ... deburr the inside or the outside of the case mouth? Does it make any difference if you do it one way or the other? Or do you go back and forth until you are satisfied?

I am just curious as I am at my bench tonight preparing .243 brass for this weekend's shooting.

ricciardelli · « **Reply #1 on:** May 14, 2004, 03:05:01 PM »

Makes no difference as long as you do it after you resize and trim.

Donna · « **Reply #2 on:** May 14, 2004, 06:03:16 PM »

Where possible I like using the RCBS "three way cutter" otherwise after trimming I deburr using some steal-wool in a little steal paint cap.

Donna

Thomas Krupinski · « **Reply #3 on:** May 14, 2004, 06:36:09 PM »

I have been doing it both ways and haven't seen any real difference.

When using a deburring tool with a power drill on 223's for use in a progressive, I try to do the inside first in the idea to keep the bevel toward the inside to ease entry into the felt of the lube die.

On those I trim and deburr before sizing and haven't measured any substantial stretch after sizing. I am using a small base sizing die, but I don't think that has any particular effect on that.

BruceP · « **Reply #4 on:** May 15, 2004, 03:42:57 PM »

Since I use one of the hand deburring tools that does the inside with on end and the outside with the other, I usually do one case inside first then the outside of the same case. The next case will get the outside done first then the inside. No use in flipping the tool back and forth twice as many times to do the same job. Dang, I need one of those RCBS electric case prep tools.
BruceP

Questor · « **Reply #5 on:** May 17, 2004, 07:03:17 AM »

A vile and onerous task! But it's got to be done. I use the RCBS hand reamer and I do the outside first, then the inside. This is just for consistency of technique, I don't think it makes a difference. The important thing is to size the cases first.

Thomas Krupinski · « **Reply #6 on:** May 17, 2004, 07:08:19 AM »

Quote from: Questor

A vile and onerous task! But it's got to be done. I use the RCBS hand reamer and I do the outside first, then the inside. This is just for consistency of technique, I don't think it makes a difference. The important thing is to size the cases first.

It makes no difference in if the case is sized before deburring. You only need to deburr after trimming, not sizing.

Questor · « **Reply #7 on:** May 17, 2004, 08:18:51 AM »

Thomas: a fair number of my new brass cases are deformed at the case mouth. That's why I size them first. My tool requires round case mouths to be effective. Maybe other tools work on a different principle.

I don't trim cases. I've measured new cases from both Winchester and from Remington, and they were close enough. Maybe some cases are more susceptible to being oversize or undersize, but I haven't encountered them yet.

Thomas Krupinski · « **Reply #8 on:** May 17, 2004, 10:29:54 AM »

I have run across quite a few new cases that were uneven lengths at the mouth in addition to being deformed. For that reason I trim them all with my Forster and the pilot bushings are a close fit and make sure the mouth is round. Then I measure to verify the length. Then after they have been trimed and deburred, they don't need deburring till after the next trimming.

I trim down to the minimum and that allow for any stretching during sizing when using a progressive. Haven't had any problems with the ones I periodically check during the process and with the completed rounds.

bgjohn · « **Reply #9 on:** May 17, 2004, 12:41:44 PM »

Right on Tom. I siz'em, trim'em, de-burr'em, load'em then shoot'em. I check length after every firing. They don't stretch much if you just neck siz'em. They last a lot longer too. Bulk brass definitely needs prepared before loading.
JM