I would go with the shehane version. now that Whidden makes match dies for these that only 160 instead of 450-500! for redding I would head that route. from what information I have gathered from a few shooters you can get that 2900-2950 you want without the sticky bolt and from what I was told they fire form with competition accuracy. you can shoot a match and fire form your brass at the same time. I going to have my smith chamber one for me and when I get it going ill post my targets and results