I just noticed that you said receiver. I don't lube the inside of the receiver nor the trigger group.
If the gun gets wet from shooting in the rain, I hose down the inside of the receiver and the trigger & bolt groups with WD-40 (WD ~ Water Displacement), let them air dry, then additional drying with paper towels, then a light wipe-down with BreakFree CLP on a rag.
For the inside of the receiver, wrap the paper towel and oily rag around a screwdriver or grasp with needle-nose pliers. Others use towels and rags wrapped about their fingers, but they end-up lubicating the receiver with a red body fluid. That drys, but clogs the action. You can tell those who do that by the embarassing red drips on their clothes.