Case preperation for rifle


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7075-T7
October 10, 2012, 10:04 AM
I was preparing some once fired and new cases for reloading 30-06 and decided to chamfer and deburr them first. I'll be loading some flat base bullets and I read on here that a chamfer helps a lot.

After going through all 60, I had a larger pile of brass shavings than I thought I would have. Is it possible to over-chamfer the necks? (still new to rifle reloading)

Thanks!

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moxie
October 10, 2012, 10:49 AM
What method are you using? If you are just using the finger operated Wilson tool, you will get a little pile of brass dust with new, once fired, or just trimmed cases. It's normal. But you don't need to press hard, just lightly contact the case mouth with the tool. The whole idea is to just make the mouth smooth enough to readily accept the bullet, and deburring just makes the outside of the case mouth so it won't hang up.

If you're using a power operated tool, you'll get even more brass shavings.

45lcshooter
October 10, 2012, 11:05 AM
I do my chamfer and debbur by hand. By hand about 2-5 seconds for each. Dont need to much pressure just enough to give an edge.

moxie
October 10, 2012, 11:11 AM
Well, like I said, a little pile is normal.

7075-T7
October 10, 2012, 11:26 AM
I'm doing it by hand with the hand tool that came with the hornady classic kit I bought last year. Good to hear the pile is normal.

I was worried that I would thin the egde too much and possibly initiate a split earlier. If nothing else it should be easy to seat the flat base bullets now.

GLOOB
October 10, 2012, 06:21 PM
I reckon nearly everyone over does the chamfers their first time. There's no need to put a bevel on the case. You just need to knock off the edge.

On the inside chamfer, I use a Wilson and give it a really light quarter turn. And yes, this helps quite a bit for seating, even on boat tail bullets, and even if you haven't just trimmed the mouth.

For the outside (which I only do after trimming), I will use the Wilson if doing it manually. About 3/4 of one slow rotation will do it. Or in a drill, I use the Lee outside chamfer tool and give the case 2-4 rotations.

I ran across a post where a guy cautioned about the dangers of over-chamfering. He put so much outside chamfer on his cases that the sharp edge of the brass started to scrape the jacket off his bullets. He posted some pics. Needless to say, his chamfer was ridiculous. He was also using a drill press and a Wilson type chamfer tool, and as expected, his chamfer was crazy uneven. Those 3-4 prong outside chamfer tools don't work for squat at even modest hand speeds. They work great when turned really, really slowwww.

Craigman
October 10, 2012, 06:44 PM
1 or 2 twists by hand is all you need. If after doing inside and outside, it looks sharp like a knife, you went way too far. Like said above....just knock the square edge off.

7075-T7
October 11, 2012, 09:37 AM
Well, I probably way over-chamfered them since I definately didn't just "break the edge" Though, the over chamfer was on the inside not the outside. :banghead:

Blue68f100
October 11, 2012, 10:09 AM
Once you do your first trim they will clean up and look normal.

USSR
October 11, 2012, 11:07 AM
I was preparing some once fired and new cases for reloading 30-06 and decided to chamfer and deburr them first.

A couple of twists of the hand-held tool is all that is necessary to chamfer the inside of the necks. Unless you have trimmed the brass, there is nothing to "deburr" and it is not necessary to chamfer the outside of the the necks.

Don

AABEN
October 11, 2012, 05:28 PM
I was preparing some once fired and new cases for reloading 30-06 and decided to chamfer and deburr them first. I'll be loading some flat base bullets and I read on here that a chamfer helps a lot.

After going through all 60, I had a larger pile of brass shavings than I thought I would have. Is it possible to over-chamfer the necks? (still new to rifle reloading)

Thanks!
What length was they trim to ?

Coltdriver
October 11, 2012, 09:18 PM
I face the edge of the case neck just enough to square it up. It gets a nice shiney ring as a result.

Then I just kiss it with a chamfering tool. I have a Forster trimmer but I just use a Lee hand held and very lightly roll the case and the tool in opposite directions. I very rarely get much of a shaving at all, a tiny amount yes, but not like a curled piece from each case.

The first time I face the neck I will also turn my chamfering tool over and very slightly edge the outside of the neck. The tool makes a ringing sound when its right and again very little brass curl from any one of them. That is usually a one time deal on newly faced brass.

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