Re: .270 load near max?
Many of my loads are a few grains over published max. To me, loading guides are just that, GUIDES. What is max in their test receiver/bbl may or may not match mine. That said, many of my loads are a few grains under published max too.
I have a 7mag wtih a Shilen bbl on it where my 150 NBT max load was about 4 grains more than published max with IMR4831 powder, as an example. In fact, there were still no pressure signs but I stopped anyway as groups were opening to just over an inch.