.300 Blackout

Looking into what it takes to make .300 BLK (7.62x35mm) from 5.56 NATO, it seems as though using a cut-off saw with a jig is preferable to using a case trimmer.  The latter is more for smaller lengths, and could be very time consuming to do.

A thread on FAL Files lists one guy's process.  I saw a jig for sale on Amazon, but another thread mentioned "the original" on 300BlkTlk, which can also trim down 5.56 NATO for conversion to 7.62x25mm.  This could be interesting.