Hello, This is my first year smoking venison. The first batch I used sausage making kit. It turned out ok. This batch was from scratch and called for white suagr and brown sugar, spices, tender quick and table salt. I oven dried it on warm for 1hr then put it in a smoker that is gas fired, with cherry and alder wood chips. I smoked it for 4hrs. Temp was around 165 internal when I lost a few to exploding. Should I be worried about the grey discoloration?