I went to Buckeystown Park today to take some photos. The park is right along the Monocacy River. I wondered up to Route 80, which crosses the river there. While taking some photos of the river, I heard gunshots coming from the south. They came in bunches of 5 to 10 about a second apart then repeated every few minutes. They continued the entire time I was taking photos about 20 minutes. I assume it was target shooting, since any animals would have been long gone after the first few shots. The shots were down the river in the photo.
I ride my bike out in the rural areas of Frederick County, and I have heard gunshots on occasion, but I have never heard that many before.