|DawgDad!! I think that clears up a problem with the Swiss Schmidt Rubin k-31. I think it had a secant ogive bullet design. I've never seen any GP-11 ammo that it was designed to use but when I started reloading for it, using the published data on OAL, I found there was no way the round would chamber, it was always way too long. The tangent ogive bullets I am using won't chamber (bolt won't close) because the shape isn't right. When I seat a bullet into the brass I have to seat it well past the crimp on the bullet. Thanks to the article you submitted and another I found HERE I have a better understanding of why I need to find a secant ogive bullet to properly fit the chamber. It's funny no one seems to mention this in the Swiss forum I'm on, but they do mention that the GP-11 ammo is the most accurate to use in the rifle. Well DuH!! because, it fits the chamber! I'm gonna havta razz some people over there.....|
Suz, You may want to try Speer 165gr BTSP bullets. They feed from the magazine, chamber well and are very accurate with IMR4064 powder.
EDIT: Speer #2034