So this lovely 340PD strikes again. The last 3 rounds of a box of S&B 158gr 357 Magnums had quite a bit of flaming blowby. I also niticed the barrel shroud was loose. Took it home and the barrel/cylinder gap had increased to ..025(measured with feeler gauges). I don't see any cracks in the frame so I assume the barrel loosened. Anyone else have this happen. The shop I bought it from is handling shipping it back to S&W to be repaired. I'm truly considering dumping this gun as I have little confidence in it now.