First of all there is no shortage.. My LGS buys ammo direct from the factory..( PMC Range Ammo) A trailer load at a time every other month 9 to 11 Pallets..
Average price increase was about 35 to 45 cents a box.. last load, last month.. That's shipped from overseas and trucked from Califorina to Florida..
Gonna guess about a .95 cents to 1.10 increase a box at the retail side..
No warning just a delivery and an invoice...