Ok, Here are "My Reloader 17 Results"
I finally got out today to shoot a new build.
FN SPR action in 300 WSM
Rock 26" SS 5R barrel m40 contour .338 neck
Macmillan A3 stock
168 Berger VLD
66 grains 2,970 mv
67 grains 3,040 mv
68 grains 3,148 mv
No signs of pressure
185 Berger VLD
64.5 grains 2,998 mv
65.5 grains 3,015 mv
66.0 grains 3,044 mv
No signs of pressure
NOTE: This was a virgin barrel, I put 4 shots down the tube to get it on paper and then 3 more. I soaked a patch of Montana Extreme Copper Killer down the bore and let it sit.
Results, No blue patch whatsoever! Yeah me!
The Rock tube holds up it's reputation.
Accuracy ran in the 8's and 9's using Win brass and CCI Large Rifle Magnum primer.
I need to play with it some more, of course.
I would rate the experience today as "promising".
Plenty of room in the WSM case to add more powder, maybe 3 or 4 more grains.
Good thread hope it keeps going with others experience using this powder.