I was ordering some 9X18 Siver Bear ammunition when the lady taking the order and asked me what I was going to shoot it in. I told her a Makarov. She asked what kind and I said German, Russian and Bulgarian. She said that was fine, but don't shoot it in PA 63's. I asked why, and she said she didn't know, but she was told to warn customers. This is the first I've heard of this. Anyone else?