I may have missed something already posted about this, if so, my apologies. I went back two years and did not see anything. I also checked a couple of other forums. What I am looking for is this: I have a lot of brass, mostly Winchester M-80 and Lake city M118 LR, and would like to work up a Case/bullet/powder/primer combination that approaches the ballistics and performance of the Mk319 Mod 0 round safely, if that is possible. I m guessing that that round uses every cup of pressure that can safely be used to get 2900 ft/sec out of a 14-16 inch barrel, even with only a 130 gr bullet. Not wanting to reinvent the wheel, I am going to cruise a couple other places to find any info I can, but I am guessing some one here has probably already tried or accomplished this. Look forward to your responses.