I did that this week and had some interesting findings....
I use the same powder (rl-19) for my 7mm RM and my 30-06 and ran out of the old powder in the middle of "new" development. So i end up tweaking the powder and both calibers had to get a larger load by .6 gr. The speed is also faster, I was expecting to see that stayed about the same.
Now, have you guys found the same results?

Thanks!