1800 Apache Loading block…. for 6BR and similar cartridges.  The Apache 1800 cases can be purchased at Harbor Freight…. I remove all foam except the top and bottom layers.  Gently tap the loading block evenly into place so that it will cover most of the case body.  These are great for traveling to matches and keeping your loaded rounds safe.  No supports are needed.  I use PLA with 15% infill.