Video is back up. ?? Looking at it frame by frame, there is a large flash only on the left side of BC gap, then flash encompasses entire gun.

Bore obstruction would be my first guess. Squib? One of the pics shows 9mm and 45acp empty brass with 500 loaded round. Will a 45 acp drop thru a 500 bbl, or lodge? An unfired 45acp round I have measures .475" dia. Fired brass would be slightly larger. Possibility??

Remington box on table but they don't show a factory 500 load on their website.

Seems like a rifle barrel mfg, several years ago, got a bad batch of SS that would split in light contours. Especially in cold weather. The 500S&W 2 piece barrel is a fairly thin contour on the inner liner. Maybe??

Would be interesting to read the engineering report on this one. Glad He wasn't hurt! Keep us posted!

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PTLAPTA!