Your thinking is flawed.
It is NOT the gun.
If a gun is reliable and sufficiently accurate then it becomes simply a test of skill.
Example: in January I competed at the S&W Academy with 69 other IPSC shooters. All classes and gun-types were well-represented.
Overall winner shot in Production Class, beating EVERYONE ELSE.
To be clear on what that means: ten rd maximum in magazines, scored Minor, stock gun (gun used was Glock 9mm), holster and mag carriers worn behind the hip-center.
This shooter beat others using optically-sighted compensated pistols holding up to 30 rds, drawn from holsters worn in competition-only positions, and mag carriers worn at the front.
Please convince me it was his gun.....................
"all my ammo is mostly retired factory ammo"