However the practice faces questions about its impact on the environment, with the Scottish Government due to bring in a licensing system to control grouse shooting.
Ministers have cited ongoing problems with illegal raptor persecution on or around grouse moors, as well as concerns about muirburn - burning heather moorland to provide fresh growth for game and livestock.
The protest group Extinction Rebellion is demonstrating against grouse shooting by placing a large "don't shoot" message in the hills near Dundee Airport.
Supporters of grouse shooting say it is worth millions to the economy each year, with around 2,640 jobs in Scotland supported by the industry.
At Roxburghe Estates in the Scottish Borders, head keeper Drew Ainslie and assistant factor Ed Brown were out on Byrecleugh Moor on Wednesday making their final assessments of the number of adult birds.
Mr Brown said: "After the past 18 months of disruption, the revenue from the grouse season will be a lifeline for small businesses, hotels and pubs in the area.
"The expenditure during the season provides a much-needed boost outwith the peak tourist season in the summer.
"Like many estates our main shooting programme will start in September.
"It's not unusual to have a slow start to the season, and the cold weather in April and May will have affected early nesting birds."
Mr Ainslie said: "Well-managed moorlands provide habitat for at least 57 bird species in Scotland, as well as mountain hares, reptiles and amphibians.
"Curlew, lapwing, meadow pipit, oystercatcher and golden plover, as well as a range of birds of prey, including golden eagles and hen harriers, all thrive on grouse moors.
"We are proud of our year-round conservation work."
The grouse season runs for 16 weeks until December, drawing visitors from Europe and North America.
Extinction Rebellion says it will be placing its large "don't shoot" message near Dundee Airport on Thursday, in protest against the impact of grouse moors on land and biodiversity.
The group says the airport is near several large hunting estates which shooters will be flying in to visit.
The protest group says grouse moors have left Scottish hills "ugly, barren and virtually devoid of life".
Scotland's Environment Minister Mairi McAllan said: "Grouse moor management is a complex issue, attracting strong views and public interest.
"The majority of those tasked with managing land already follow best practice guidance and care deeply about the countryside and the land that they manage.
"However, I cannot ignore the fact that some of the practices associated with grouse moor management, such as muirburn and the use of medicated grit, have the potential to cause serious harm to the environment, if the correct procedures are not followed.
"Neither can I ignore the fact that, despite our many attempts to address this issue, every year birds of prey continue to be killed or disappear in suspicious circumstances on or around grouse moors.
In November, Scottish rural affairs minister Mairi Gougeon announced the Scottish Government's intention to bring in the licensing system for grouse shooting.