Smith & Wesson Semi-Auto Pistols

[CBR1943]

Bought a S&W model 41 7-inch barrel in 2024. Shoots 3-inch groups at 25 yards securely from bench pistol rest with CCI standard and mini mag ammo. The same ammo at same distance in the 5-inch barrel shoots 1/2-inch groups. Both barrels is topped with a sig Romeo 1 red dot. Any ideas on my failure?

 

[ACEd]

Bought a S&W model 41 7-inch barrel in 2024. Shoots 3-inch groups at 25 yards securely from bench pistol rest with CCI standard and mini mag ammo. The same ammo at same distance in the 5-inch barrel shoots 1/2-inch groups. Both barrels is topped with a sig Romeo 1 red dot. Any ideas on my failure?

Rifling on 7 in barrel slightly more worn or barrel / slide tolerances tighter on 5 in barrel.

 

[Tom S.]

Check the end of the 7" barrel with a powerful magnifying glass or loupe. Even a minute ding will destroy accuracy and there is no reason why that barrel shouldn't be as accurate as the 5". It's very rare to see a .22 barrel wear out, but a good cleaning might also be in order, and then an inspection with a borescope if you have access to one.