I do. I use a light weight home made single point sling that stays on the gun all the time. I just clip it to a 'D' ring on my arm for kneelers and standers.
I find it helps a lot especially with kneelers, not so much for standers because of my crap technique
Daystate Mk4 iS ST (Huggett shroud & Mod .20) Lightstream 4.5-14x44 FFP
Daystate Grand Panther (Grand Prix stock, .177) Nikko Stirling Diamond 10-50x60
Daystate Panther (Gary Cane custom stock, .177) Sightron SIII 10-50x60