Don't think the original measurements could be off- I'm pretty anal about this stuff.
The best performing loads use RL-25 and MRP. As to primers, the best have actually been the old Winchester white box type that are marked " For standard OR magnum rifle loads"
Remember those? These I have had vac-packed and rat holed since the pervert (Clinton)
was in charge. Rate of fire is slow, with a lot of cooling time. I am new to the forums, but I am not new to hand loading or shooting little bug hole groups. It's just that in 40 yrs of doing this game I have never seen this before.
Now I have seen very rapid erosion happen to 3 barrels at the very end of their life- barrels that you expected to die some time back, but manage to hang on, and then suddenly you can't find the throats without a scope. Now you have a nice long tent stake.....
