Now! Now! Dave, don't get picking on us Boinger shooters.
Personally I don't use a sling, so if it came from a spring gun shooter.....then Who?
And IMO using a sling to steady your aim with a sling on a spring gun on kneelers and standers would surely change the POI of the rifle. Going to have to try it now.
The Pope HW97 V-Mach. Gary Cane Laminate stock. Leupold Competition 40 mag Mildot.
The Smiler. Walther LGU. WE Laminate stock. Leupold Competition.
The Dark Destroyer. TX200 MK3. Leupold Competition 40 mag.
Pro-Sport. Warren Edwards Blue Laminate stock. Bushy 8-32x40.