I have in the past managed to conceal my S&W 25-5 with 8 3/8" barrel in an Uncle Mike's shoulder holster. It wasn't comfortable at all and I eventually gave the holster to a friend with a Ruger Redhawk in .454 Casull. The only reason for concealing it was when stopping at the store for a snack or drink before going in the woods hunting.
Stu
Stu