1. I'm loading very close to the lands, which increases the pressure. I'm using a 22" barrel - shorter than what most loading books use. Sierra lists max velocity with Varget, 120grain bullet as 3000; Hodgdon lists 3117 fps. Likely by 42.0 grains I am at max pressure and the loads above this should be avoided if possible. (Note I did see progressive flattening of Winchester LR primers)
2. Given the higher tempperature, the 41.6 load of today's data probably compares to the 41.2 gr of previous data (and note their vertical position is similar). Possible accuracy loading for summer might be 41.6, for winter 42.0 or slightly more. What do others think?
3. The geometric centers above 42.0 grains just make a circle -- probably because they are all statistically "identical" (impossible to separate with only 3-4 shots per group.
4. Note for this test, today, at least, the graphite regimen didn't perform very well for reducing the first shot error. With very few tests, the grease so far seems slightly better. Interesting that the first shot was indeed slower, again.
5. Something about what happens when the case is JUST slighltly too long--does it hit an assymmetric junction between shoulder / neck / leade of the chamber and BEND the case? Best thing I can think of to explain the wild shots is that the bullet got started aimed slightly off center.... Any other theories?
2. Given the higher tempperature, the 41.6 load of today's data probably compares to the 41.2 gr of previous data (and note their vertical position is similar). Possible accuracy loading for summer might be 41.6, for winter 42.0 or slightly more. What do others think?
3. The geometric centers above 42.0 grains just make a circle -- probably because they are all statistically "identical" (impossible to separate with only 3-4 shots per group.
4. Note for this test, today, at least, the graphite regimen didn't perform very well for reducing the first shot error. With very few tests, the grease so far seems slightly better. Interesting that the first shot was indeed slower, again.
5. Something about what happens when the case is JUST slighltly too long--does it hit an assymmetric junction between shoulder / neck / leade of the chamber and BEND the case? Best thing I can think of to explain the wild shots is that the bullet got started aimed slightly off center.... Any other theories?