The camera that captured the bullet-impact scenes is high-tech, high-buck kit.

Although the pressure of the ultra-liberal lead-bullet ban agenda might put us all in more of a 'need' for the final solution unleaded bullet design, I'm not going to sweat this one with any of my value-engineered to death (spare..!?) time.
North Fork and the guys down in SA seem to have for now answered the problem with a product that no one seems to be bitching about.

It's much more likely that I'd be found out in the machine shop with a dressage whip in one hand and a streaked and submissive strumpet's ass in front of my camera than huddled over a crapped-out double rifle with a bunch of smartypants hunters trying to get the lighting right for a photo opportunity on OSR damage.

That's something you CAN take to the bank.

Cheers
Tinker