Look at the reloading data center on
www.imrpowder.comThey've got tons of free data.
Hodgdon owns IMR and Winchester powders also so data for all three is listed on that website. I'm gradually drifting towards Hodgdon's Extreme powders in all my rifles. I used to use a lot of RL powders but with RL22 and RL25 I got some wild pressure swings during the summer, the hodgdon powders are supposed to be more temperature stable. The summer heat and humidity is brutal on shooting down here, it's almost impossible to keep a rifle cool after a couple of shots.
I'd agree with the others that if you could score some H4350 and H4831 you'd be set for the calibers you mention. The key to finding powder is to check in with your local gun shop a couple of times a week. I've made it a habit of swinging into my LGS almost every time I go past there and in the last few months have scored a bunch of Varget, H4350, and Retumbo as well as CCI450 primers I needed. I could have had 4831 and a bunch of others but I don't use them. The powder is out there and showing up regularly but you have to troll for it and grab it before it gets snatched off the shelf. A shipment of Varget will be gone in two days from my LGS, but I've been able to get my share.