Yes, 356 is better than .355 IMHO. 357 would be even better. again, IMO.
If they are sized prior to coating, that will make a difference, as the coating will make it larger, and help limit, or eliminate leading. I know some people do it this way.
Coated bullets are miles ahead of the old plain lead with lube in the groove.
If possible, I prefer to shoot a slightly oversize bullet - same as some others have said.
Sorry to be slow in response - I hadn't seen the notification. Lots of support from others though.