I agree with those that say hold on to everything until you hear back from the ammo manufacturer. Once you mail anything to anyone it is out of your control.
If the ammo company agrees to reimburse you for the gun and the ammo then I would send the gun to S&W for them to give it a look see. Heck, if the ammo company agrees to buy you a new gun and then you send it to S&W and they agree to send you a replacement, you could end up with two guns.
This is small compensation for the possibility of losing an eye and glad that you are OK but it would be neat if you ended up with two guns.