I started loading for the 270 in 1972, through two barrels I've used H4831 about 90% of the time. I went through a bottle of RL-22 with great results, but then started seeing the reports of temp variations so went back to H4831. Way back when the gun and I were younger, I used 4064 with Sierra 110 sp and 90 hp. Worked great and those 90 hp really blew up the hedge apples I shot for practice.
