Original 10ga chamber length would have been 2 7/8" . One would assume that a competant gunsmith would have checked wall thickness at chamber end when sleeving barrels, but its possible he did not. I'm aware that when asked about wall thickness, I've seen some gunsmiths pull out a bore gauge and suggest that a person can measure wall thickness with that and a ruler/OD caliper.
Correction
This was an early hammerless, 1890's gun. I don't what the chamber length for such an early gun would be. All the more important to carefully mic the barrel wall thickness. Wall thickness is life, or at least your hand. Did I tell you about the newly made AYA 12 that ruptured into a personal injury plaintiff's lawyer's leading hand and caused significant bone, tissue and nerve damage? Wall thickness new was .020, but the barrels were light.
|