Sean, do you have the dual map ignition?
When I first got my 300 I was always running it in rain mode cause I really liked the massive torque, but found it caused too much instant wheelspin in slippery conditions. I've found it better only in real tight high traction situations. I've since been using it in the sunny setting a lot, especially when its greasy. It really softens the off idle hit for more slow speed traction, and there is still plenty of instant power for getting over obsticles (more like a 250 feel), plus it doesn't flatten out in the upper mid revs like the rainy setting. This is assuming its jetted correctly. The LTR needle made it run a lot better all round too.