back in the day we used the 22lr kit on the indoor range with the old slow ROT m16a1's. they worked pretty good.
some have used the kit with 1-9 twist barrels and got spotty accuracy.
the 60gr loads should help as they are more the correct length for this rate of twist.
having a can shouldn't affect accuracy much if any at all.
i haven't used any 22lr kits yet with the 1-9" twist so i can't say, though you should be OK with the 60gr AFAIK .