Working up a load for my old lemon squeezer using new Starline brass, ACME 78gn LRN & Unique. I started @ (1.0 grains) to avoid stressing the old gun. These performed weaker than I desired and I noticed unburned powder on the bench top below where the gun was held when firing. I moved up to 1.25 grains of Unique and got performance I am happy with. I did not notice any significant unburned powder with the 1.25 grain charge. With this combination, and a short 3" barrel, should I be concerned about unburned powder in any amount or is it not uncommon to have some unburned powder?