It's possible to find cedar that will make 600-650 grain arrows. I have lots of 11/32 cedar arrows, 29 inches back of point, spined 70-85# that make up into 625 to 675 grain arrows with 135 to 175 grain heads. Also have Doug fir in the same range. Doug fir is tougher, but I still use mostly cedar. I've been collecting the good stuff for more than 30 years so it's very high quality. BTW, I agree with moebow, Surewood produces excellent Doug fir shafts. They're a better choice for stumping than cedar, IMO.