Cedar arrows will not hold up to shooting from a heavy bow. Period.
I stopped using cedar 20 years ago, and now go through W-A-Y fewer arrows per year.
Douglas fir, lodgepole pine, or any of the hardwoods make great, durable arrows-----and they penetrate better too.
If you read Dr. Ashby's reports, you will notice his studies show that good, hardwood arrows experience far less breakage when striking heavy bone than carbon arrows.
I first noticed this on a stump shooting outing with Kelly Peterson (Arrows by Kelly) in the Stanley Basin. He wanted me to try some of his heavy carbon arrows, and in less than 15 minutes I had broken three of them. He was shocked. I went back to my strong, durable compressed lodgepole pine and didn't break a single one for the rest of the weekend.
The durablility of cedar arrows is zero. The durablility of carbon arrows is a marketing myth. If you disagree, closley read Dr. Ashby's reports, then buy some high-quality Douglas Fir or hardwood shafts. You will see the light. . .