I have several targets that look shotguned with small parts of jacket and lead from my 1-7 twist barrel AR 15 .
The bullets were Hornady SX , several brands of Hornet class bullets ect ,thin jacketed varmit bullets.
The bullets come apart in mid flight.

I have great luck with bullets as light as 50 gr in my 1-7 barrel with groups.

For chucks I shoot a 55 gr Balistic tip out of my barrel. ( can't remember who made it , NOT Colt junk)

Johnch