Great topic - I have found some really cool stuff at beartoothbullets.com:
http://www.beartoothbullets.com/rescources/index.htm
Particularly, this ballistics site:
http://www.beartoothbullets.com/rescources/calculators/balistics/index.htm
With my 700 BDL 300 Rem Ultra (26" barrel) I found a nice shooting load using the 220 Nosler Partition (semi-spitzer). and can get .375" 3-shot groups at a 100 yds:
220 grain Partition semi-spitzer
77.0 grains IMR 4350
Federal 215
Overall Cartridge length 3.590"
The shots I get where I hunt...