Suppressors on average increase velocity by 20 M/S but the Mosin seems to get cut to 340 M/S when the velocity should have been increased ever so slightly.
Mosin M91/30 velocity: 815 Meters/Second
Mosin M91/30 Suppressed velocity: 340 Meters/Second
Is this for balance or just a missunderstanding of how suppressors work?
Now before someone says “but the MP5SD decreases velocity” thats because the barrel is ported inside the suppressor to lower the pressure.
It also has a shit ton of spread too
What?
Wut
On your point, I have a suppressor and a friend who manufactures guns and cans. I have not seen or experienced nor heard of anyone with any suppressor that had any increase in velocity. In almost all circumstances with testing, we all show a 0-2% reduction in velocity. Never an increase. I would love to see what test samples you have that show an increase.
Suppressors increase pressure causing increased velocity and rate of fire in blowback firearms.
“In blowback firearms.” You got half your science right. It increases back pressure on the barrel and chamber, forcing the bolt back harder and faster on blowback gun, but has zero affect on the bullet. It also has zero affect on the action of bolt or gas operated guns in terms of velocity.
The suppressor on the M250 increases velocity by 20 feet/second and its similar in design to most suppressors
20fps is about the same difference in velocity as shooting 2 identical rounds with a single individual grain of powder missing or added. It is nothing, not even in ballistic statistics. Considering said rifle rounds you are talking about fire around 2800-3000fps, that is less that 0.4% difference.
So please, stop googling stuff that you have no idea about and posting it asking for changes.
Now I could be off base here but the idea and mechanic of a suppressor is to divet the gasses from the muzzle at the end to reduce the noise. Which means although in theory the bullet has a longer travel down the barrel, thr propellant gas behind is bled off at then end , which usually results in a small but measurable loss of velocity.
Of course all suppressor mfgs are different so I cannot say in absolute that one cannot increase it, but I’ve never seen an article on that happening and would love to read one if available.
Ok but the Mosin M91/30 going from 815 M/S to 340 was too absurd for me not to mention
Pretty much right. Bullets gain speed through the gasses pushing them through the barrel. Point to keep in mind, the barrel and bullet is measured precisely to diameter for those gasses to make that seal and push the bullet most efficiently. 7.62mm diameter for example. Suppressors must always have a slightly larger diameter hole through their baffles to allow for clearance only the bullet as it passes. 7.62mm suppressors for example have an 8mm hole throughout. A suppressor is made with large open chambers to allow the expanding gasses to slow down before exiting the barrel. These gasses slowing down are the exact opposite of what makes a bullet go faster.
Mechanics of guns in general I’m versed in.
But we don’t have suppressors up here so its never something I studied with great intent or interest.
Thanks for the info.
Oh shit if that’s the actual number then that’s fucked. Unless the intent (which is sounds like given the velocity) is to assume that the round fired is a subsonic round to maximize noise reduction. Anything over mach creates a sonic boom (1100-1150fps roughly) which causes rounds to create a loud cracking sound when fired through a suppressor. Staying under 1100 fps (335mps) is subsonic and would be extremely quite. This is why the 45acp is very popular for suppressed weapons as it naturally fires around 900-1000fps.
Ya 340mps that’s a subsonic round. That is intended and not a mistake. It is not standard ammo.
I dont think 7.62x54R subsonic existed during WW2 since Suppressors were prototypes and rare
You can reduce velocity 2 ways. Increase weight of the bullet, and reduce the powder charge. Reducing the charge also reduces the power, so most of the time you try to increase the weight. But you can only make a bullet so heavy (or long technically) before the twist rate of the rifling can no longer stabilize the bullet and it basically turns onto a tumbling football. 7.62 on the mosin for example the standard weight if I remember right is around 148gr. The heaviest I’ve ever seen a .30 or 7.62 is 220gr and those rounds still run around 23-2600fps, well past mach.
The russians tried using 7.62x39 subsonic 200gr bullets but found that they suck ass with performance. So they necked up the case to the 9x39mm which is about a 250gr bullet moving at 1000fps that still packs a decent punch. 9x39mm is most commonly used and known in the VSS rifle.
That’s up to the devs, but I can just about guarantee that 340mps was intentionally made to be a subsonic round.
Mosin Suppressor should use subsonic bullet to make sure noise reduction performance. The bullet will painted green to make different with normal bullet.
stupid yanks… dont use feet per second as fps in video game discussion.
