This thread is a good example for any P3AT newbies out there.
These lightweight pistols can be ammo-selective, especially with JHP. Most P3ATs these days will eat almost anything - others are a little more picky. If you are experiencing issues with a certain ammo, try another - heck, try 3 others. Part of getting a carry/sd rig together includes some experimentation. I would judge a SD round on these 3 characteristics, in this order. For target ammo, you can drop #3. FMJ all performs about the same.
1. functionality
2. accuracy
3. performance (penetration, expansion)
Among different JHP rounds, you may see some variance in all 3 categories. Obviously, functionality comes first - it has to work every time. At the range that a P3AT is likely to be deployed, accuracy is less important. I rate performance of the round last but some may disagree. Shoot most folks with the worst performing round you can find and they'll be leaving pronto, if they are able. :-?