I use a shooting jacket and a sling, the reason for that is simple first the rules allow them, second I want to progress and try different disciplines.
For me makes no sense complain that someone has an advantage using a piece of equipment when the rules allow everyone to use it and a shooter prefer not to.
Check this video made by Sergio, I’m the one in Star Wars jacket, I’m still looking for a helmet
Who do you thing that has a more stable position a tall person with a jacket and a sling using tension against the body to keep steady or a shooter that rest its rifle on the leg and support it by the bone structure?
As far I remember I never saw a Word Champion with a pure shooting jacket, it’s not the equipment that makes us win it’s the dedication and work that we put in this sport.