A post on the LCSCA Forum in Dec. 2014 regarding a 1906 No. 0 10g; barrel composition unknown by the gentleman:
“I was at a farm where a guy I have known for a couple years came out with this L.C. smith. He first shot the gun with Federal Premium Vital-Shok 3 1/2 Inch Magnum copper-plated 1100 fps 27 pellets No. 1 buck (27 pellets of #1 buck is about 2 1/2 oz.). I still have the box and 1 live shell. He fired one shell out of each barrel with no problems. I asked if I could shoot the gun...and fired 1 shell out of each barrel.”
“I have never seen a gun this old nevertheless shoot one. I thought it would be cool to hunt with it.
I'm guessing from your comment not such a good idea.”
A recent thread on Shotgun World
https://www.shotgunworld.com/threads/identifying-belgian-10-gauge.552771/#post-4774604OTOH
Buck Hamlin’s destructive testing, courtesy of Tom Archer
http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=422672&page=2 Buck Hamlin was given an extremely well-used damascus barrel Lefever with a burst right barrel just past the forend tip. The barrel wall thickness at the rupture point was .010”, and the chamber was 2 5/8”.
With the intent to rupture the left barrel, Buck measured the bore diameter and started his effort with a box of 2 3/4” 1 5/8 oz. short magnums. After 25 shells the left barrel had no change in bore diameter. He then lengthened the chamber to 3”, and following 25 1 7/8 oz. magnums (lead #2 and BB) there was still no change in bore diameter.
Buck then lengthened the chamber to 3 1/2” and used 3 1/2” 2 1/4 oz. lead turkey loads. The left barrel blew after only a few shots. The wall thickness at the rupture point, which was almost aligned with the bursting point of the right side tube, also measured .010”.
