Just yesterday I tried 43, 44, and 45 gr of A2700 in my Ruger 77 Swift with 50 gr WW bullet. 43gr=3850, 44gr=3956, 45gr=4024. 44 and 45 gr loads were getting a little sticky, but it was around 80 degrees. Accuracy was .587 for 43, .889 for 44, and 45 I pulled one for 2.020 but the last 2 went into .416. I quit then but will try the same loads today with 50 gr Vmax. I used 4064 for many years, but may go to A2700 now. 24" Douglas barrel. As always, work up. Barlow