I second leaving a slightly fouled bore for hunting.

I'll find my best load at the range. then I'll clean as usual. Then, I'll send a couple more shots downrange to confirm the POI, then leave the rifle with a 2 shot fouling in it for the field.

Most of my rifles shoot pretty close to the same with an ultra clean barrel or fouled, but my most consistent shots in a 5 shot string are usually shots 3-5.

And as GRIZZLYMAN said, make sure that clean barrel you're starting with is bone dry.