Are you cutting weight right now too?
In the long run, around 270 would be a good weight for you at your height but you want to be leaner for sure, maybe 20%bf at most and leaner if possible. Rather than trying to win a weight class in a meet that doesn’t mean anything, maybe try to gradually cut so that you can make more progress in terms of strength would be a better way to go and focus on the long term. Like try to lose about 1 pound a week, which will certainly have less impact on strength/building strength than what you had in mind. You could do short bulking cycles as well (after the meet) but nothing drastic, aim to gain no more than 1/2lb per week for about a month and then cut again.
Cutting for too long becomes less effective and you will plateau in terms of fat loss, plus you will start to lose a lot of muscle (and probably strength too). Also, you don’t want to cut more than 2lbs. per week, even if strength is not a priority, because you will lose significant amounts of muscle mass at that rate. The exception would be if you were using certain PEDs, but that’s not something I’m qualified to talk about and I’m not recommending it either.