Note that the PD bullets must be ordered in qty of 2K, 4K, 6K, etc..
So you are really spending $260 for 2K at the low end vs $140 for 1K of the others.
Not sure if this is a factor for you in terms of cost/qty.
-Jedi
--EDIT---
Actually you can order only 1K but it's a $5 charge I think based on this:
Bullets must be ordered in multiples of 2,000 (calibers and bullet types can be mixed and matched by the 1,000). If your bullet order totals an odd quantity, we do charge $5 (this charge will not be reflected in your shopping cart but will be charged when we process your order.)