I use the 1/8 oz jigs for Smallies at Cumberland and Dale Hollow with 8lb test at night and 6lb test in winter. This allows me to fish it pretty effectively up to 20 feet deep. I really never tried it any deeper than that. Any deeper and I move up to a 3/8 or 1/2oz. I tried heavier line with this jig but do not catch as many fish. I think the lighter line plays a part in giving the jig more action. When the water gets down below 55 degrees, I use straight hair jigs with no silicone skirt. When I am fishing deeper than 30 feet I never had much luck with a jig on Smallies anyway and switch to a 1/2 oz Silver Buddy. Hope this helps.

Tight Lines