Your different velocities could be from slightly different chambers, like in the leade and throat area.
I've loaded Lapua at 43.5gr of Varget and Win at 44.9gr of Varget to get velocities within 17 fps. The difference of 1.4 gr is just from the capacity difference. I'm basically saying that all load data should list components. I'm wondering how many have used data only to find that they've made an overcharged case because the type of brass wasn't mentioned.