Remember that in CE, carrying too much ammunition increases a pawn's "Bulk" and weight. A heavy inventory slows down your pawn's base movement speed, which drastically compounds the movement penalty applied by RunAndGun. Keep your mobile skirmishers light.
Fast, lightly armored scouts can suppress advancing enemies while retreating to secondary defensive lines. rimworld run and gun combat extended
Master the Battlefield: How to Combine RunAndGun and Combat Extended in RimWorld Remember that in CE, carrying too much ammunition
Suppression & Fire Discipline