Bat Size

So i am having trouble with my bat size i am 19 and i am a bigger guy i weigh 265 and i am 6 to 6’1 tall i swung a 33/30 through highschool and now swing a 34/31 im just looking for some input i have the bat speed to swing the 34 but i feel like some days i hit the ball harder with the 33/3o and other days i hit the ball harder with the 34/31 so i need some input

I don’t think you are going to know by coming to the park and say well it a 33" day or a 34" day, more than likely it’s about being quicker with one pitcher or another…you need to rate the pitcher and decide to lighten up or stay heavy that day.