I use Hornady brass and you can use up to a 73gr or so bullet with the 1:9. So your 69 should be fine. All depends on powder and what your gun likes. Both my bolt action and AR are 1:9 and i was shooting 55 grs and just bought some 68 gr BTHP to try those..
I load mostly for a bolt action so I only neck size and do not own a Dillon so can't say on that.
This link is helpful.
223 Rem + 223 AI Cartridge Guide