I prefer heavy for caliber bullets but the all copper bullets have changed that option because of their longer overall length then the jacketed lead bullets. When Nosler and Hornady introduced their non lead .277 bullets they came out with 130-grain bullets. I suspect they did that because 130-grain is the best copper weight for the 270 Winchester. Nosler has come out with a new 6.8 bullet at 85-grains most likely aimed directly at the 6.8 Remington
I must admit that the kid in me was tempted by the high velocities the 110-grain Barnes TTSX bullet can be driven. When standing at the display shelves I had a box of 110-grain bullets in hand, but put them back and purchased the 130-grain TTSX bullets. The higher B.C. of the 130-grain bullet should pay off.
270 Caliber
Diameter Weight Description S.D. B.C. CAT#
.277" 110-gr Tipped TSX BT .205 .377 27772
.277 130-gr Tipped TSX BT .242 .392 27775

Right to Left: 130-grain Hornady, 140-grain Hornady, 140-grain old style WW Silvertip, 130-grain Barnes TTSX, and 150-grain Sierra BT.
First two 130-grain Barnes out of my rifle that was sighted 3” high at 100-yards with the WW 140-grain Silvertip.

My old eyes were not sure of what I was seeing after firing the second shot. I took a walk down range and confirmed that #2 cut #1 shot. I took a picture with my camera phone.
I was tempted by a nice bear when carrying the rifle loaded with the Barnes bullets, but I passed because I did not have a bear tag in my pocket. I did kill a buck later that season with a 270 using the reliable cup and core 150-grain Hornady.
I have talked to a couple of hunters that have taken bucks at over 300-yards with the Hornady 130-grain GMX. They were happy with the bullet. A shooter at the gun club was not happy with the 130-grain GMX bullet at the range, but had good experience with the Barnes TTSX.