Some powders are the same but Tac and H335 aren't. Ramshot is owned by the same parent company as Accurate, but I don't think Accurate sells Tac under a different name. Some people have said it is really 2460, but the country of origin is different even if the burn rates and load data are virtually the same.
Ramshot X-terminator and 2230 are however (currently) the same powder.
New gun, same ol' shot.