[N310toN170]

Thanks for the suggestions! I have a Harbor Freight fairly close to my home and after reading thru the article had to give this method a try.

Unfortunately, the first saw only turned on about a half dozen times, then the switch went out. The second one is still working. The very first thing that should be done after unpacking it is to remove the blade cover and reinstall the screw that holds the blade in place with Loc-tite or similar compound! The blade on my assembly almost came completely undone while cutting brass.

I used the suggested method with an old .308 case but was having a hard time getting even cuts so I tried this...

Take a 1 1/2" x 1/2" piece of wood and cut two lengths between 4" and 6":

Place them together and drill a 1/4" pilot hole:

Using the pilot hole drill out to 3/8":

Now that your working with a 3/8" hole, use a 3/8" spade bit and drill to the depth of the original .223 shoulder:

Set the new wood channel in-line with the .308 case, once aligned tighten the clamp:

With this setup I was able to get a good, clean, straight cut on the brass and minimize the work needed on the much more exact trimmer blades: