Comment: certainly, technically you can;

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In reply to comment: Correct me if I am wrong but... (see in situ)

certainly, technically you can;

if you can 'rifle' a 12~16" diameter tree trunk .D

or happen to be a crafty German or a Japanese dude with a knack for tinkering; god, how I'd love to see these guys tinker with firearms tech!

504 rounds! Motorized Rubber Band GATLING GUN/ oggcraft.jp

http://youtu.be/XeDXVN52cHI
oggcraft
Uploaded on Feb 25, 2008
handmade machinegun.
magazine capacity:504rounds
http://oggcraft.jp/eng/eng_p503_1.html
http://oggcraft.jp/eng/eng_gun.html

Full Auto. 32 Rounds. Turret Mounted. Home Made.

http://youtu.be/ROe7PiHHBDA
JoergSprave
Published on Oct 13, 2013

Indiegogo fundraiser: http://www.indiegogo.com/projects/zom...
Facebook: https://www.facebook.com/zombiewars

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Rotational action is the key to full auto slingshot fun, as this video clearly demonstrates! This drill powered bolt shooting rubber machine gun is pure rat-tat-tat fun. See how it fires 32 pencils in just a few seconds at Zombie heads, and much heavier steel tipped aluminum bolts from a longer distance.

This innovation clearly has potential. Powered by a bigger engine or a bicycle and shooting larger, heavier ammo, this could really be a serious weapon.

A "The Slingshot Channel" production!

as for "printed ammo" in not too distant present, with improvement in polymer formulation .D

PolyCase Ammunition .380 Ammunition Behind The Scenes Production Video

http://youtu.be/3icrCXr4m1U
Polycase Ammo
Published on Dec 6, 2012

Take a look at part of the production process of PolyCase Ammunition as they create the future of ammunition, the polymer-cased bullet.

Learn more about PolyCase Ammunition here - http://www.PolyCaseAmmunition.com

Follow PolyCase here:

Facebook - http://www.facebook.com/PolyCaseAmmo
Twitter - http://www.twitter.com/PolyCaseAmmo

Not wood, but an interesting make-shift SHTF DIY solution:

Explosive Tipped Crossbow Bolt

http://youtu.be/r7NHtHWaGNM
DemolitionRanch
Published on Nov 7, 2013

Testing some homemade explosive tipped arrows.

COUPON CODE for Exploding Targets.
Use code "Demolition" for 15% off entire order.
http://www.last-man.net

Follow us at http://www.facebook.com/DemolitionRanch

Intro made by http://www.youtube.com/user/Autodidac...

Music is called "Club Diver" by Kevin MacLeod from incompetech.com

Predictions in due Time...
http://www.youtube.com/watch?v=zGDisyWkIBM

"Let it not be said that no one cared, that no one objected once it's realized that our liberties and wealth are in jeopardy." - Dr. Ronald Ernest Paul