Here are the reloading data from the Sierra Reloading manual
Powder /Velocity---950--1000--1050--1100--1150--1200
AA-No.9-------------9.2---9.5---9.9----10.2---10.6---11.0
2400-----------------9.4---9.8--10.2---10.6---11.0---11.3
Viht N110-----------8.9---9.3---9.7----10.1---10.5------
H110----------------9.6--10.0--10.4----10.8---11.2---11.5
296------------------9.3---9.7--10.1---10.5---10.9----11.3
Viht N120----------10.5--11.0--11.5---12.0---12.5------
AA-1680------------11.2--11.6--12.0---12.4---12.8---13.3
These data were shot from a 10-inch barrel T/C Contender. A 16-inch barrel will add about 150 to 200 fps to these muzzles velocities.
I have shot 180 gr Sierra MKs and GKs using several different powders and have gotten max muzzle velocities from 1780 to 1800 fps.
If you want to check out my load go over to Reloaders Nest. Most of the loads listed under "Not yet verified user loads" are mine. The loads that are not mine are the one that list Vitha N110 powders AD2205. There might be one other load listed there that I did not shoot....
320pf
http://reloadersnest.com/frontpage.asp?CaliberID=135