The 6 CM is the same kit as the 6BR - #1 plate and buttons with a 6PPC funnel. I have no idea why the 6,5CM kit runs a #M, I've been using the #1 for everything with a 473 bolt head/308 derivatives (6,5CM, 6CM, 6BRA, 8x57) with no issues.
I assume you mean if you got a 6 or 6,5CM kit to use for 22CM - then yes, you would need the kit plus an additional funnel (probably a #A for 22 cals).