Pat; My 257 Roberts with the 115/120 grain Partitions positively loved a stiff load of RL22. I'll not say exactly how much, since it was well over book loads, but suffice to say, start at 45 grains and work up carefully. My 24" barrel spit the 120 out at 3000+ and would shoot one ragged hole at 100 meters. Regards, Eagleye.