Given that Hornady decided to stop making 200gr. bullets in .400" (so I've heard and lack of availabilty supports), I've decided to use 180grain bullets. The XTP has a great reputation for penetration and retaining its weight. The problem is my reloading dies (the seater die) flattens or deforms the HP cavity slightly, especially with Starline Brass. Another GT member provide details on making a custom seater die with expoxy and it works, but I'm looking for a more permanent situation. What brand seater dies do you use with XTP bullets? Do they flatten the HP of the XTP? (My dies are RCBS and I have three different seater dies, two for FMJ and one for round nose - none solve the problem.) Another option is switch bullets, which I'm open too. I've thought about swithing bullets to Speer Gold Dots, but I don't know about their weight retention/penetration characteristics and they are VERY hard to find. Remington makes a HP too, but again, I don't know about it's reputation in 10mm. I am looking for a "woods" defense load for black bear and mountain lion. I would like high weight retention and penetration - and it has to be a hollow point as some states do not allow FMJ to be carried during hunting seasons. I also want to shoot it out of a stock G20. I don't want hard cast lead either. Thanks. Wanna kill these ads? We can help!