I don't like using my longer range varmit rifles for those shot under 300/400yds. Depending on conditions(wind) above 400 yds I might use a 6RemAI and it gets into 600yds or more I'll use a 6.5x284.
300 Winmag shooting the 125 gr. BT. Way too much fun on pds. To save on the barrel I only use it past 400 yds.
For closer shooting I use the 204 with 40 gr. Bergers, 243 and 70 gr. Speer HPs and the good old 22-250 with Sierra 1330 or 1360 sp. For walking around the 223 and 40 gr. Sierra HPs.