Resistor reliability question

[RetroHacker]

I'm currently working on a GE console set, 40's vintage. I still have a few more capacitors to replace, but I don't have them on hand. I've got B+ and heater voltage, and the audio output section (push-pull 6Y6) seems to be working. At the moment the set is still silent, although I can get crackles by wiggleing the bandswitch, and a faint buzz if the volume is turned all the way up. This set uses the old style "body-end-dot" resistors. The ones I have checked seem within spec, but what is the general reliability on these things? Are these better or worse than the carbon composite banded ones? What's the makeup of these, anyway - wirewound? Carbon? I know with carbon composite, they tend to drift up in value, especially the ones that were larger values to begin with. Any "gotcha's" with these?

-Ian