"Normally" leading at the forcing cone or beginning of the barrel indicates too small bullets. A couple thoughts; slug the barrel and measure the cylinder throats. The cylinder throats must be larger than the groove diameter. If not, a trip to the gun smith is needed. Size or purchase bullets the same size as the cylinder throats for a starting point to avoid leading...Clovishound said:I tried some 148 grain cast WCs in Clovispup's new SP101. They were accurate, with soft recoil. They also deposited a ton and a half of lead in the forcing cone. I have decided that this revolver just doesn't like lead. Earlier this week I picked up 100 copper plated WCs. Shot about 30 of them yesterday. They were accurate, soft recoil and no leading. I think I will order 500 of them later today. The only odd thing was that the SWCs she shot left cleaner holes in the target than the WCs. Didn't look like keyholing to me. Perhaps it was the lower velocity of the WCs. I didn't look carefully at the target up close to make sure they didn't keyhole, but I would expect the accuracy to be horrible, if they were keyholing.