The bottom of the crimp groove should be contoured more like a "hand hold" as opposed to a steep and consequently slippery surface allowing the bullet to wedge its way out of crimp during recoil.
This will assist the crimp, and help to avoid elongation of the cartridge under recoil.
We now know there can be long-term consequences from repeated head trauma, as in contact sports, but the impact from most levels of recoil
aren't even close to a helmet-to-helmet encounter or a combination punch from a talented boxer.
The AR pads are more sophisticated incorporating "collapsing air chambers" and upper and lower "impact pillars," which even out recoil
impulse while contributing to "controlled force direction" to minimize muzzle jump.
They all work together to provide a flexible interlocked shock absorber, and according to Benelli, provide a 50 percent reduction in felt recoil
from their ComforTech system.
the requirement for breech locking has been sometimes overcome by pure blowback systems utilizing extremely heavy recoil
springs as in the case of the Spanish Astra 400 and 600 models.
Getting the best of recoil
is simply a matter of preparing for it.
While I like the idea, I don't think it's possible to nail down recoil
with such precision.
For longer sessions of load development I wear a PAST recoil
No one, no matter how strong, can adequately manage recoil
by gripping the gun by its sides.
With 250-grain loads it recoils
at 19 fps and 49 ft-lbs of energy on the shoulder.
The amount of gripping force must be very firm to keep the handgun under control during fast shooting and with the recoil
of most self-defense loads.