Was this the right move?

$7,500 guarantee at Bodog. I had about 1200T with blinds at 50/100. I was dealt 72o on the button and it was folded to me so I raised 3x the BB and got called by the BB. Flop was 567 and the BB went all in with KQo and I called and won. Two orbits later with blinds at 100/200 I have 2300T and I have A7o on the button and again its folded to me. Now I'm thinking if I raise the BB will probably push with any reasonable holding if not anything at all after seeing me raise with the 72o. I did raise, he did go all in (with 200T less than me) and I called. He showed A8o and won the pot. Should I have put my tournament on the line with the A7 there thinking he would push with something as bad as J9 or something like that? I'm pretty sure I made the right move as I was getting low on chips and needed to make a move somewhere. If our stacks were deeper then what do you do?? Thanks in advance.