I just have a few boxes laying around. Not currently using it. Just would like to know factory COL for it in case I decide to load up with it in a mag or 2, but I agree HST has fed great and is my go to. I am looking for a COL for both HST and Golden Saber but I have so much HST I will just measure all of them and come up with an average. My thinking is to know the minimum safe COL so after chambering a round 2-3 times, I can measure it and if it is still longer in case length than the minimum COL then that round is good for one more chamber in my opinion. The Golden saber I would like to know what the minmum "should" be.