Ok Arthur I brought the magazine to work, here goes for the momentum test:
1. 2219 and 2213 cut to same length
2. 5 inch feathers left helical
3. 2219 @ 600 gr 2213 @ 400gr does not specify how this was done, only that
weights were adjusted
4. Velocity calculated to give same KE for both shafts
5. Draw weight changed and bow retuned for both arrows
6. Paper tune each arrow prior to testing at the distance test was conducted, 16
yards, chrony 1 yard in front of test material.
7. ethafoam and styrofoam used because of homogenous nature
8. each arrrow shot 9 times, velocity and penetration recorded
The results are as follows:
Ethafoam
400 gr arrow, 128 gr bullet point, velocity 244.8, KE 53.28,
Penetration 12 1/32 in

600 gr arrow, 128 gr bullet point, velocity 201, KE 53.84,
Penetration 11 15/16

Styrofoam
400 gr arrow penetration 13 3/16

600 gr arrow penetration 13 1/16

His conclusion:
" Data from test 5 and 6 strongly support the theory that kinetic energy, not momentum, is the dominant factor controlling arrow penetration, all other variables being equal. As a reminder, professional engineer Norb Mullaney addressed this same question with a different testing format. His test data support the conclusion that kinetic energy is the primary factor cotrolling penetration when all other variables are equal."