You did not state your drawlength, but I can tell you right now you're skating on thin ice. ATA minimum arrow weight chart:http://home.att.net/%7Esajackson/amochart.html][/url] http://home.att.net/~sajackson/amochart.html

If you're drawlength is 27.5" as your arrows are, then according to the chart you should be shooting an arrow of about 440 grains weight.