x2Are you saying you had 60 chicks in a 2 foot by 3 foot brooder? That would only be a total of 12 square feet which is way too small for that many chicks. So, to begin with you need a much larger brooder. I had 27 chicks in a brooder that measured 8x10 (80 sq ft) and they did well AND grew into it very fast. Second, if you do only have a 2x3 brooder with two heat lamps I am guessing you have on heat lamp at each end. It could be they are getting over heated if they don't have any place to get away from the heat. That can kill chicks a lot faster than being too cold. You say you are using "fine pine shavings" for bedding. Switch that out for the larger pine shavings. Fine shaving create way too much dust for chicks. Also, did you cover the shaving for the first few days with paper towels? It could be that the chicks that dies ate the shavings. Always give them a chance to discover their food before they discover the shavings. Now, you are using a 5 gallon waterer and a 30 lb feeder which would indicate that the 2x3 brooder is a mistype since those would fill the brooder and leave no room for the chicks.
Can you provide a picture of your setup? It might make it easier for use to offer more acurate suggestions if we could actually see what it looks like.