All very helpful replies there guys, thanks very much. I'm doing my best to get my .223 running on the same powder, so my research has narrowed it down to N130 & N133 which looks like a good choice for both calibers. Going to the shop later today so will get one or the other!
That data is just the starting point I was looking for, thanks. I'll drop 5 grains and work up of course.
Cheers
Greg