.350 Rem., Lyman 350447 (250 gr.), paper patched w/ green bar printer paper, ~21.3 gr H-4198. Mild midrange load, about 1200 fps. Some of my other loads about like this (but with a lighter bullet) were burning a little dirty, so I wondered if using a magnum primer might clean things up a bit. As it happens, this load was pretty clean either way, but ...
Same day, same time, same rifle, same old Oehler 35 gun club chrono --
- standard primer, 3 rounds: 1254, 1228, 1238 (avg. 1240 fps)
- magnum primer, 3 rounds: 1169, 1219, 1214 (avg. 1201 fps)
Not a typo. The same load with a magnum primer was slower than with a standard primer.
How about that.