When I acquired my first hunting rifles decades ago I not only cleaned it after each hunt, but very often cleaned it at the end of every day in the field.
Years later while doing my professional hunter training in Northern Zululand under the late Ian Goss (past President of the Professional Hunters Association of Southern Africa), he said I shouldn't apply my military rifle cleaning discipline to my hunting weapons.
He said he cleans his hunting rifles at the start of each season and again at the end of the season. Whenever he went out on a hunt, he would check zero on the range at the hunting destination, but his barrel would remain fouled. Only if he had to hunt in very dusty and windy conditions or in torrential rain, would he clean and oil the weapon. In South Africa, for most of the hunting season its dry so my weapons go for the full hunting season (May to August / September) without a clean.
Three to five hunts a year - 3 to 5 rounds to check zero on each hunt and perhaps another there rounds on the actual hunt - that's maybe between 20 to 40 rounds per season in total between cleans, and if I'm hunting different calibres, that's between 7 or 8 to maybe 15 rounds per weapon per season. Not a problem for a hunting weapon.
Ian Goss' rationale was that one shouldn't mess with the zero once set by unnecessarily cleaning the weapon too frequently.