At Wal Mart, the typical bulk pack is the 550 round red box, load 750. At Sportsman's warehouse and elsewhere, there is the 525 round blue box, load 745. What are the differences in accuracy and reliability in these two loads? They seem similar, but the 750 is a good bit cheaper. This is going to be used in everything from a Spikes .22 AR to 10/22s to Browning Buckmarks.