While the editors may think that short articles are best for us time-stressed modern readers, with me it works the opposite.
Hunting and shooting are an escape for me. When I go to that world, I want to stay there awhile. I have enough short-term interruptions in my job and don't need them in my hobby.
One magazine I like (you have to like target shooting) is Precision Shooting. The only ads are for shooting related things and sometimes are as interesting as the articles.