Used to reload for a shooting bud that had a Ruger P-90. I only use Win LPP and his gun didn't like them. We'd shoot some pin comps and he would consistently have 3-5 mis/hang fires per 100 rds. No probs with any factory rds, just my WLP rds. Sounds kinda like what prob you have. As said, let us know what the Hornady rep says. Tracy