I have owned more than ten 270s and have always used IMR 4350 or IMR 4831 in them, mostly because the late Ed Matunas said to use them in his handloading articles in American Hunter back in the 1980s. Anywhere from 54 to 56 grains of either IMR or H 4350 has worked well for me with 130 grain bullets. Two more grains of IMR 4831 works as well and is generally 50 fps faster. I have always used the 4350s as I had lots of it around. My current (and only) 270 has a custom Shilen 24" barrel. 55 grains of 4350 gives me over 3,100 fps and excellent accuracy with Barnes TSX bullets. I have Mag Pro and RL-26 and will have to try them for some more velocity.
There is nothing wrong with using the Reloder powders or good old H 4831. I just happened to use 4350 first and stuck with it.
