If you are talking about this percision bullets. http://www.precisionbullets.com/
I have used them and really liked the 45 230 grain RN. I found them to be about as clean as jacketed and much easier to work with then plan hard cast lead. They shot very nicely for me and I found them to be very accurate. They cost more the plan hardcast, but I feel that they are worth the price when compared to the cost of jacketed 45.
I have also tried the 9 mm and 38 versions and I liked them but I don't think they are worth the money. For only $5 more you can order jacketed from Midway.
The guy that own the place is great and I found him to be very helpful with all my questions.