I'm very spoiled in that I use a lathe with a purpose built tool for holding a shell head, then using a mandrel in the tail stock inserted in the neck to keep things aligned while trimming with a tool bit. Extract the mandrel and clean up the edges.
It's very easy to set up a stop so that all of the trimmed cases are within thou of the others.
A similar system can be made up for a drill press if you're handy.
Then of course, there are motorized trimmers for sale. I was lucky enough to pick up the unit made by LEE. It was used but came completed with all of the accessories and then some than I will ever need.
These units are cheap for what you get and the results are very fast/consistent/effortless.
If you don't trim a lot of cases, the best thing to use is a ''trim die" Set it up in your press grab a fine tooth flat file and within a few swipes the case is trimmed very evenly, before dropping the mandrel, use an inside deburring tool to bevel the edge and then remove the case and use the outided deburring end of the tool to clean up that edge.
Once you've done this a few times, it easy to do over a hundred cases in an hour. I use a couple of battery operated drills to hold the deburring tools, which quickens things up. Not necessary if you don't have one.
If push comes to shove and you don't have a deburring tool, the edge of the file can be used to debur both in/out case mouth edges.
One fellow I know, uses his chucked up inside edge deburring tool and drill to trim down the case mouth right to the trim die, then extracts the case to put in a tray until he's finished trimming then flips the deburring tool and goes back to take off the outside burrs.
It's very easy to set up a stop so that all of the trimmed cases are within thou of the others.
A similar system can be made up for a drill press if you're handy.
Then of course, there are motorized trimmers for sale. I was lucky enough to pick up the unit made by LEE. It was used but came completed with all of the accessories and then some than I will ever need.
These units are cheap for what you get and the results are very fast/consistent/effortless.
If you don't trim a lot of cases, the best thing to use is a ''trim die" Set it up in your press grab a fine tooth flat file and within a few swipes the case is trimmed very evenly, before dropping the mandrel, use an inside deburring tool to bevel the edge and then remove the case and use the outided deburring end of the tool to clean up that edge.
Once you've done this a few times, it easy to do over a hundred cases in an hour. I use a couple of battery operated drills to hold the deburring tools, which quickens things up. Not necessary if you don't have one.
If push comes to shove and you don't have a deburring tool, the edge of the file can be used to debur both in/out case mouth edges.
One fellow I know, uses his chucked up inside edge deburring tool and drill to trim down the case mouth right to the trim die, then extracts the case to put in a tray until he's finished trimming then flips the deburring tool and goes back to take off the outside burrs.
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