Maybe I got bad thinking , but on a spring gun like hw i do think there's a comfortable weight range in no too light or heavy pellets ..
.177 I like to stay 7.9 -9 grain
.22 I don't go oner 16 so 14-16
Now a good gas ram probably 18 and a bit more . Depending on leade fit .. like avoided too snug or tight ones ..
Anyway wether true or not pellet choice can factor in spring / seal longevity / health . Of course all that is a individual opinion on any experience on best practices.