Going with an "over the counter" round for a handloader seems strange to me. I've read here a number of times that it's easy to find rounds at the corner store for a 7mm but not for an AI...so what? Who among us is satisfied with store bought after shooting your own loads? If/when you forget your shells at home, and stop at the store to buy factory, how many rounds do you fire at a target to sight in before shooting at game?
I have tried a few times to put some factory rounds through my guns...they don't hit anywhere near where I've sighted my home rolled ones!