I am sure they could order me the 300 spine, but I am pretty peved with them right now. I went in and told them my set up and the sold me the 340's sfter looking my specs up on the chart. He could have told me that he did not carry the proper spine and order them fir me, but instead he sold me the under spined arrows instead. This is the owner of the shop and I have been in a few times to have work done to the used bow i picked up. So I wasnt just a one time sale.