55 gr. will be fine for 100yds and in. if you are sighted in for 55 gr then switch to say 68 gr. you might see a lower impact at 100 yds. in one of my guns the difference between 55gr and 69gr(fed. match) was about an inch.
ymmv
BHA 55 FMJ and 68 OTM are gold standards and truly outstanding loads for their type. Those FMJ is an excellent training load, the OTM for matches, duty, and small or 2-legged game.