I like Sitka spruce, (not the cheaper, lower quality German spruce).
Sitka is considered to be the strongest wood for its weight in the world. The very reason it was used for airplane frames and masts and spars on sailing vessels.
It's super tough and light. It's easy to get a 500 to 530 gr arrow with a 125 gr point.
And if a person wants to get a higher FOC arrow, one can achieve that without the finished arrow getting excessively heavy.
I have built Sitka arrows that had a 20% FOC, and only weighed 575gr. Really hard to do that with other woods, especially fir, even though fir is also a great arrow wood. It's just different.
Many target, and 3D archers like the benefits of the lighter mass shafting, which helps flatten the trajectory significantly.
However, if a person is looking for good Fir shafting, no better place to go than to Surewood, great folk, great product.