Adam, A 20 ga. Field Grade "elsie" with either 26" or 28" barrels in your neck of the woods would make a nice quail gun. I think in both length barrels, imp. cyl, and ligh modified would be ideal.
All L.C. Smiths from the factory unless ordered different were full/full. The bores were always .615.
What to be careful about is that 20 ga guns prior to the mid 1930's is that they will be 2 1/2" chambers. Guns made after this period, most will have Chambered 2 3/4 Inches on barrels water table.
This limits you to use either re-loads or a few shell manufacturers as RST.
Good luck in your decision and let us know how you make out.
Last edited by JDW; 08/22/12 09:13 AM.