Momentum = mass x velocity. In order for the heavier arrow to penetrate less, the velocity would need to be a decent amount less, or there would need to be another factor at play (such as friction). The OD of the 300 is slightly larger than the 400 (.242 vs.231), which could reduce the penetration on a target that stops arrows by friction. Do you know the difference in arrow speeds?
I would suspect that the tuning is slightly off, introducing an additional friction component if all other factors (same shaft materials, field point styles, etc.) are the same. Do both bare shafts fly straight & parallel to each other out at 20-30 yards?
|