The Walmart by my house has 100 round bulk packs of Remington, Winchester, and Federal 12 gauge target loads at $21.97 a box. Since all three are the same price, I was wondering which one you guys considered to be the best in terms of performance for shooting clays. I was also wondering if you knew which one leaves less carbon in your barrel.

The only visual difference I could see is that the Federal are 3" and the Winchester and Remington are both 2 3/4". Does that make any difference?