On my 270 Win, I’ve primarily reloaded 100gr-140gr bullets. Loadings are as close to or over 3,000fps. My fastest was 3,400, Barnes 110 TSX. I never saw a reason to load heavier bullets for this caliber. Because realistically the 270 Win was made to be a fast flat rifle and to get there powder is in the neck, sometimes compressed.
I’ve had great results with the faster burn rate ball powders Winchester 6.5 Staball/H100V. They fall right next to one another in the burn rate chart and I use them almost interchangeably. Besides those, I’m also a fan of Ramshot Hunter and that was the powder that was fastest with Barnes 110gr.