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Posted: 9/15/2012 3:14:24 PM EDT
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If I don't need to trim my fired brass, should I still chamfer the neck?
It was done before firing for clarification. |
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Quoted:
I was under the impression chamfering is to remove the burrs on the case mouth created by trimming. If you didn't trim then you shouldn't need to chamfer. I agree. I have found it necessary to chamfer (brake the inside edge) of once fired brass. I have had the factory cut case mouth shave bullet jackets during seating. I use a VLD chamfer tool too. |
| IMO, the recent use of FCD or collet type crimps combined with the sizer expander ball pulling up a burr as it is extracted, could create a case mouth that had some sharp edges. If that was the situation, then chamfering would be helpful. If the neck of the sized case feels smooth and rounded then chamfering would probably not gain anything. |
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Dillon's trimmer trims and chamfers the outside of the case as it cuts at a 4° angle. It trims so cleanly that after a 10 minute tumble to remove the lube I can't see nor feel any burrs on the case. I've found no difference in the accuracy of my handloads, the ease of seating the bullets, nor any scratching of the bullet that were chamfered on the inside or not so I don't do it anymore. My son's Savage Model 10 shoots 5/8" groups at 100yds with my 68grn Sierra handloads that aren't inside chamfered. Here's a picture of a trimmed casemouth showing how smooth it is. This is before tumbling to remove the lube. Where are these burrs that everyone is talking about.  BTW, this cutter has in excess of 19,000 pieces of brass trimmed on it and I have two more cutting surfaces on the blade. |
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