They're too short. I bought some duratrax low profile bullets at my LHS. So far htey are staying snug. Don't let the duratrax label scare you, they are gold plated and nice and snug. I'm sure duratrax doesn't actually make them Couldn't find a link but this looks like the exact same bullets. http://www.fantomracing.com/proddeta...?prod=FAN26150 Team epic also sells some that look identical .