Nice shooting with CO2 in the cold. Always wanted one of those "Dual Fuel" Daisy's. Now is the time of year to be using the pump. It should be even more consistent.
You are right about using the pump in cold weather versus using Co2. It also has the added benefit of not having any additional costs. The downside is the work involved and the amount of time between shots. Unfortunately for me I really have to be in the right mindset to shoot break barrels because of the amount of work.