Jim SoG
Copper BB
Your hand isn't trapped in there any more than your weak hand is trapped in the factory forend strap. But it can certainly help shooters control the recoil, and stay on target. Strap or no strap, if you have to reload a shotgun in a defensive situation, you are probably already screwed. But 99.9% of Shockwave users aren't going to be in that situation 100% of the time.
Ouch, math......99.9, 100......LOL