Took the offending LRP back to the range today. The first three shots were incredibly far apart. I corrected and shot three sets of
bug holes before it started changing point of impact drastically. The other thing that's happening is...even though I'm only shooting
41.5 gr of H4350 behind 142 smk's...I'm blowing primer pockets. After 150 round down the pipe I've blown out 19 cases.
I'm baffled.