I recently bought a Lyman mold 311 284 on an online auction. I didn't read the description fully and it came with dimples in the mold cavity. It appears the previous owner used a center punch to put two small dimples in one cavity and one dimple in the other. When I saw that I freaked out and re-read the auction description and found where the seller disclosed this and said the user did it to identify which cavity a bullet came from. Is this a common thing? It seems like it would lessen accuracy. A would appreciate any thoughts on this.