My 257 Roberts' load shoots 85 grain Nosler CT bullets at 3,525 FPS measured by my old chronograph. I have that sighted in 3" high at 150 yards. at 300 yards according to my shooter phone ap is .7" low, at 400 yards it's 9" low (1,094 Ft-lb energy and 2,407fps) at 500 yards it's 23.5" low, 2169 FPS and 888 ft-lb
A 270 with 130 grain E-tip: I have sighted in 2.1" high at 150 yards - the following is according to my phone ap
3100 FPS at muzzle; 300 yards it is -4" 2519 fps (1832 ft-lb); 400 yards - 15" 2342 fps (1583 ft-lb's); at 500 yards -32", 2172 fps and energy at 1362 ft-lb
Last edited by Bugger; 08/13/20.
