Knowing if you're carb sensitive or not is really a trial and error process. Finding out if you burn fats better with higher or lower carbs, knowing how you feel between the two ranges, how well your body spares muscle mass between the two... blah blah. So being that most men aren't carb sensitive, don't worry about that for now.

Don't up your proteins yet. Protein requirements go up as cals and BF go down. So for now, the 250 is just fine. Taking in more isn't going to do anything for muscle sparing or fat burning.

As an easy example of what to do to bring your cals up...

You're set with 250g protein. That's 1000 cals.

Fats, I like to have 0.5g/pound BW. That would be 95g for you, 855 cals.

You'd fill in the rest with carbs.

So between P and F, you have 1855 cals. Aiming for 2500 cals, would leave you with 645 cals to fill with carbs... 161g.

You want your carbs to center primarily around your workouts and breakfast.

In terms of cutting, splitting up your meals to be P/C and P/F, IMO is the best method. Plus, it helps to keep better track of your meals and cals.