RE: arrow safety ??
without actually doing the math that might be a tad under the 5 grn per lb guide line, but it's pretty darn close. I think it would be fine any considering you have a 27.5 inch draw length. They figure that for a 30 inch draw length. The less draw you have the less power your bow has, so you can get away with lighter arrow.
Bowjacksons site has a chart for minimum AMO arrow weight going by draw length, cam type and poundage.
Keep in mind if you are shooting a very fast bow that also becomes a consideration.
If you are going to compete I would check to see what minimum weight is legal.
Good luck,
Paul