In my post #3 above I was referring to the safety of the charge weight using different bullets of the same weight. (55 vs 55 . . 62 vs 62 . . etc)
I have had bullets that weigh the same,from different manufacturers,shoot a foot apart at 100yds. Whatever different 55gr bullet you choose,you could have to tweak the scope. (Make the scope look at where the bullet is hitting.)
Let us know how it goes. --- SAWMAN