varget is still hard to beat in the .308 if you wanna drive it like you stole it... I'm at 43.1 grains with Sierra's 200 grain Matchkings, from a 26" barrel I'm getting 2590 fps... I've shot this load to 1200 yards on steel with fantastic consistency. Longest kill on a deer was only 500 yards, but it did the job, of course.
I shot this load in 95 degree weather in the hot sun about 5 years back, and it did great. The Varget doesn't misbehave at all when the temperature heats up.
I'd say Varget would drive the 185's to near 2700 fps in a 26" barrel, and likely close to 2600 in a 24"... but from a 20" barrel, it would still be hard to get over 2500 fps (but that would reach out quite some distance, of course)...