A 1:10 twist will stabilize a 52 grain bullet OK. How well it groups vs. 55 grain FMJ bullets is something you will have to find out for yourself. Forget using 5-shot groups to judge grouping capability. They produce statistically meaningless results unless you fire a large number of them (like 20 or more). The only thing five-shot groups are good for is zeroing your scope. Using 10-shot groups, preferably no fewer than five of them, is far better. Average the ESs of all groups as your measurement of grouping capability. That is, if you are really serious about knowing it. Firing 50 rounds of each will tell the tale without any doubt.