Lube some, but not all.
I reload 45 ACP on RCBS carbide dies, and I lube about 10 cases out of every 50 or so. Due to the size of the 45 brass, even with carbide dies, there will be a decent amount of pressure required to resize the brass. So, I will lube a few cases, resize one of those, and then go with unlubed brass for a while, and when the resistance increases, I go with another lubed case. Mind you, I'm doing all my reloading on a single stage press, but I have found that one lubed case will leave just enough lube on the dies to make resizing 5-10 unlubed cases fairly easy.
D