I wouldn't shoot steel out of it but it is easy enough to hand bismuth or ITX shot for it . Those barrels are irreplaceable and were designed for lower pressure 2.5"/65mm lead shot shells.
That doesn't mean they won't be effective, I load 3/4oz of ITX-10 shot in my 16's and 7/8oz in my 12's.
1oz of BB's in my 16ga/16ga/9.3x72R
7/8oz ITX 6' and 1 oz of Bismuth 5's in my 2.5" 12ga