Shot the 25/06 today with staball and 117 sierras. Started out at 46.0 and went up in .5 gr increments. Groups were nothing to write home about. 1.25-1.5” or so. At 47.5 groups tightened up considerably to .5-.6” range. 48gr went right back to about 1.3”. I loaded several more w47.5 and started dialing up to shoot 200, 300 and 400 yard gongs. I didn’t chrony the load but my dope is indicating about 2950fps. I may add more powder to see if I can get another sweet spot before running into pressure or I might not. I’m getting almost identical velocity w URP and 117 sierras but the URP load is averaging slightly better accuracy. That load incidentally is also 1 grain under book max. W URP I was using RP brass and CCI large rifle match primers. Today’s loads were new WW brass and LR STD primers. Rifle is a 700 w 1-8” pac nor barrel at 24”.
Three shots at 400 went about 1.75” with the 47.5 gr staball load. All loads were .010” off the lands. I originally built the gun for 133-135 gr bullets but I’m saving those for now for a fast twist 25x47 that should be here any week. More tests to follow.
