I bought a 30 caliber FREECHEX tool about eighteen months back and have not looked back since. With my 30-06 Garand and Al checks on a special PP boolit I am getting good accuracy at 2800 fps. By purchasing a roll of 0.014" Al roof flashing from Home Depot for a pretty low price I have cut and formed over a thousand checks and still have a couple of yards of Al left. I am talking well less than a cent per check. That is economy! Gas check shanks vary a little from boolit to boolit and mold to mold and I found that sometimes the GC would come off in flight. This was indicated by a little poof in the dirt about halfway to the target and poor accuracy. A little super glue on the boolit shank just prior to seating the GC fixed this problem and I have not looked back!