I tended to shoot heavy arrows because I draw 32 and needed more spine weight. I think the most important though is the arrows need to be tuned well. I shot aluminum. many switched to carbon for traditional because they recover quickly after release.
When I first started bowhunting. I just bought some arrows. Didn't know about tuning and arrow flight. I could put the broadhead in a deers ribs but the arrow was not straight on impact. got very little penetration and lost deer. Gave up for years Decided to get back into it and did a lot of reading and research. The right arrow spine and tuned arrow that recovers quickly and flys true will penetrate well. with a sharp broadhead. The last ones I killed zipped right through the deer.
