Is it the bat or is it me?

Recently I watched a senior league softball game at Arcata Park. There were guys in their 50 and 60's who were hitting the ball 300 ft. How is that happening? The Miken Ultra 2 bat. This bat adds at least 50 feet to a hit from what I saw. I will be playing the in the senior league this next year and I am curious how far I will be able to hit the ball. I just hope that guys aren't using them to hit singles up the middle. Then it becomes a safety issue. I prefer wood bat leagues where everyone is equal.