they probably have a dot on the monitor sothey dont need to no scope
Might be helpful for really
really close range but the bolt action rifles do have a
terrible cone of fire inaccuracy of 7.0 when you're no-scoped regardless of whether you're moving or standing still. Compare that to pistols @ 1.0 standing or moving, SMGs @ 1.0 standing or 1.5 moving, ARs @ 1.5 standing or 2.5 moving, or even LMGs @ 2.5 standing or 4.0 moving.
You're going to miss
a lot of all but the closest range no scopes with that kind of cone of inaccuracy. I've tried using a dry-erase dot on my monitor way back when BC2 was first released but its simply not worth it, I'll almost always try to quickly scope in for just about all of my shots unless its out of desperation such as I'm jumping over a rock or around a corner and happen onto an enemy right in my face.
I seriously doubt the OP is getting no-scoped all that often. I'm a huge M40 whore and I'm almost always at least quick-scoping to make sure my shot is accurate.
You can shotty people at like 50-100 yards if you have the right kit ... it's crazy.
Torso one-shot kills with slugs and magnum ammo really don't have quite that range (its ~10-20 meters just like the main game bolt action snipers) unless you're playing noob-core where the shotties with slugs and magnum (along with sniper rifles) will kill anyone from any range even with a foot shot.
IIRC, they made it so that a bodyshot from a sniper rifle will 1 shot kill at under like 40ft or something. It used to be the same damage regardless of range, but now they can snap kill you pretty easily.
The bolt action rifles were always body shot 1-shot kills at 10-20 meters depending on magnum ammo as they'll do 100 damage up to ~10 meters until that range before their bullet damage drops off as low as 50 starting at ~35 meters and will drop no more.
The change made in Vietnam is that the M40 starts off at 105 damage and drops off only to 70 damage, a significant increase from the main game. Whats more is that the doubled the range before damage drop off, the M40 will do 105 damage out to ~20 meters and doesn't drop off to its minimum of 70 damage until ~55 meters and beyond. Without magnum ammo you can still get body one-shot kills out to ~25 meters. Magnum ammo extends that body one-shot kill radius to ~45 meters.