im no top shooter, but i have recently bought a shooting jacket and i do belive it is an improvement. got to thank that as i paid about £140. to my perception i feel i am steadier on aim and due to the precise fit help in the positional shots, but dont ask how many standers i got at gp1 thank you very much. lets just say i need to practice very hard, for a long time. bought mine from the birmingham armory as i needed the knowledge on fit. given my limmited knowledge on it i would have bought a jacket 1 size too large for me. if you go down that route, try one and get some input from knowledgable staff or you will spend much money for no good reason.