As
@raisins said you have to specify the insert size. I've never looked for brass inserts for aluminum as they are heavy enough without. The arrow you are describing will likely way somewhere north of 750 grains. There's no difference in shooting form between carbons and aluminums. I shoot a light cant to get my eye over the arrow and it's the same with both. I was cutting them with a tubing cutter the other day, you'll need to take a file to the inside to ream it out a little afterwards as the tubing cutter pinches the end closed a little but, you can also cut them with an arrow cut off saw, or a dremel.