About an hour ago I shot a big boar (about 250 or a bit less) with my 260, using a 100 gr Nosler Ballistic Tip. Shot him behind the shoulder, about 1/3 of the way down from top of the back. The first shot would have been fatal, but I plugged him again as he was steaming toward a briar patch. He almost made it. Range was about 125 yards. Good exit wound (for you BT naysayers).
So your 260 is good pig medicine.
The problem I have with the 'shoot em behind the ear' idea is that unless the pig is eating, he is moving. This one was at a fast walk on uneven ground for the first shot and he was hauling some serious pig butt when I tapped him again with shot number 3. Shot number 2 went somewhere other than pig.