Call me old(I am) but I still use old faithfull IMR4895 for everything 22-250 through 7mm mag and it works for me but like yours it is always out of stock. Six or seven years ago I started buying in 8lb. containers and have learned to start looking for it when I am down to 3lbs. left in jug.Just like primers powder has become suspiciously scarce so whenever I see in the store (which isn't often) I grab some, started stocking up on primers and powder about six months ago after I ran out and couldn't load anything for almost a month.
IMO start stocking up with what works for you, lay in an over supply because you never know what will happen.