In a cordless drill I use a .30 cal bore brush in and out again, then swab with rubbing alcohol. If you think about trying something like a Carbon Express Heritage, I use the aluminum inserts for the 150's and 250's but need a 100 gr. brass insert to help with weight up front for the 350's. I love having all components interchangeable. My 150's are 450-475gr. depending on which bow in the lower 50lbs, 250's are about 575 - 600gr. and the 350's about 740gr. My main bows poundage runs 58-60lbs at my draw, which is about 27.5", shafts are apprx. 29.25 front of shaft to nock. There are helpful posts on this sight to foot them with aluminum and make them stonger than anything you can buy that I know of.