It all depends where you go .
Some gun shops sell lots of different 308 loads others don't .
Some of it is what the shops push in the way of rifles.
Where I shop he stocks 1 270 load , 2 or 3 30-06 but lot more of 7-08 and 308.
But he stocks mainly 7-08 and 308 rifles.
His thing is ordering exactly what you want.

Johnch