I have always shot the Nitros due to buying a 25 count box. Now that they are almost gone I will probably try the heavy 13s , but the Nitros are worth every penny. Reason for me saying that is because you spend way more money on fuel,leases,camo,guns,sights,Etc than what a 8.00 shell cost and it is ultimately what kills the bird.. both are great shells, I know alot of people that shoot both with great results..