"Huh?" Samuel looked back and walked over to flip his fish before tossing some seasoning over burnt part, an sitting back down. "Well uhh... I guess they might. Poison would likely burn up when the hammer ignited the gunpowder though. If anything it would be a coating of lead, mercury, or a pocket within the bullet full of heat resistant toxins... Likely any of the 3 would cause it to seem like the bullets were coated in poison. Though truly lead would be the most effective. Lead poisoning can cause lots of problems, ranging from fluids entering the lungs and wounds not healing, to vommiting, dizziness, and even heart failure."

Samuel list of symptoms, clearly not taking a hint that you feel you may have been poisoned.