So your a master of survival and scavenging and can pull food and ammo out of your ass after a few years of surviving?
Stockpile!
thats the whole point of not shooting till they see you moron, which is why I've been talking about close range, inner-building fighting.
Pistols have something nice called a magazine, very handy when you need to reload.
Good luck finding plentiful subsonic rounds 0.o. Subsonic rounds only muffle the sound of the bullet, not the actual metal parts of the gun. So if your shooting anything that is out of range of hearing the slide move and lock or you pumping the gun, your wasting ammunition again.
You get ammo and food in buildings, not big nice fields with random stands sitting around, If your shooting at all, its going to be things almost right in front of you. If your running out into the street shooting things at 200 yards who don't even notice you stealing some food and ammo, Good job you caught all of their attention and now theyre going to be chasing your ass down.
http://www.grsc.com/images_crs/200_yards.jpg
Good luck shooting something that far without being in a good position, with iron sights, and relatively calm. And good luck being calm if 100 of these bastards are running at you. And if this is the head-dead zombies (only killed with a headshot) your screwed even worse while chasing you.
You are correct in that they muffle only the sound of the bullet. However working a lever action isn't that loud. Also making subsonic ammo isn't hard at all. Especially if you have reloading equipment. Remove bullet, empty powder to desired level, but back bullet. This has been done before historically. Jews in occupied areas surrounding Germany would often need a concealable weapon. Not having a pistol on hand they'd chop down rifles. They'd then fabricate there own reduced loads.
I'm well aware of what 200yds looks like, I'm confident that I could do it with the irons on my Ar, Mosin, SKS, or AK (I practice with 8" steel plates).
A scope would just make it all that much easier. I wouldn't try to run and shoot. My strategy would be shoot prone, then book it. For somone less experienced than I, I'm confident they could do 75yds with little to no training.
You can stockpile 10+ years of equipment in one area without ever having to leave 0.o?
"My strategy would be shoot prone"
Wow you people really arn't getting the image lol. You prone in the middle of a street in a city, a zombie comes up behind you, hey guess what, your screwed. Go ahead and try to sprawl up from a prone position and try to outrun a zombie. (Fast or slow).
Think of it like L4D, now imagine you proned to shoot all those buggers coming down an alley way, oh cool you popped off a few headshots, oh wait an entire horde of them just came up behind you and you cant get back up.
All of these shots should be either standing, or MAYBE crouched. If not, then you shouldn't be shooting aforementioned target.
And if you take out the powder your just going to make the bullet so weak your better off saving it for closer range targets anyway.
This isn't a little strip of field that you can lie down and shoot at zombies all day, this is, you surrounded in a city full of them and your trying to get in and out <.<. Which is going to be at least 50% of the time your going to be scavenging, the other 20% barricading, 20% sleeping/eating/etc., 10% actually holding down your AO from swarms attacking you.