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07-09-2009, 02:51 AM
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#1
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Supporting Member
Join Date: Jan 2009
Location: Boulder, CO
Posts: 3,239
Liked 21 Times on 17 Posts
Likes Given: 12
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poor mans crono???
Ok, I know a poor mans crono is an aluminum coke can. But how far away should you stand? What penetration is what fps roughly? If it doesn't Peirce it at point blank is it safe to say fps is under 250???
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07-09-2009, 03:09 AM
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#2
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Join Date: Oct 2008
Location: Pierce County, WA
Posts: 8,925
Liked 220 Times on 185 Posts
Likes Given: 6
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From: AS-R Review Database - Testing the Poor Mans Chrono - Powered by ReviewPost
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Load up the gun to be chronoed with some .20-gram bb’s. If you use .25-gram BBs your results will be flawed; I’ll explain later. Now align the muzzle of your gun 1-2 inches from the surface of the can, any closer or further, and your results will be off. If you are shooting through the side or sides of the can simply stand it up on a level surface. If you are shooting at either the top or bottom of the can, lay it on its side. Lastly, do not hold the can, this messes up your results too,
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Quote:
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In order to accurately gauge your velocity, your shot must pass through the target are of the can in one shot; if it doesn’t, you’ll need a new can. Near breakthroughs and "It almost went through!" won't cut it here, that BB has to be on the other side of the target.
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Quote:
There are six ranges of penetration on a Coke can. In order of difficulty they are:
One Side…………….290+FPS
Both Sides…………..340+FPS
Bottom Center………385+FPS*
Bottom Edge………...450+FPS
Top Center…………..470+FPS
Top Edge……………500+FPS
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So from that I would say any gun incapable of completely penetrating at least one side following the correct procedure would be under 290 FPS.
__________________
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I run Condor gear just to piss you off.
It's working too...
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07-09-2009, 03:21 AM
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#3
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Join Date: Jan 2009
Posts: 1,265
Liked 10 Times on 10 Posts
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yeah from what i hear sparky's info is good =D as always
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www.xboxnewz.com
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07-09-2009, 06:20 PM
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#4
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Join Date: Jul 2009
Posts: 117
Liked 1 Times on 1 Posts
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hmmmm i wonder what my gun gets, never cronoed it myself :S
*goes off to find coke can*
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07-09-2009, 07:31 PM
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#5
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Join Date: Nov 2008
Posts: 2,605
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Coca Cola and Sprite cans will be the best to use. pepsi and other drinks(beer cans) are not always the same density.
__________________
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Looking for the best M4 or really any AEG for under $200? Look not further than the G&G Combat Machine M4 (Blowback or Non-Blowback).
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07-09-2009, 09:07 PM
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#6
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Supporting Member
Join Date: Jan 2009
Location: Boulder, CO
Posts: 3,239
Liked 21 Times on 17 Posts
Likes Given: 12
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Took the gun to AEX today. These were the crono results with .20
107fps-226fps-235fps-260fps-266fps-242fps-261fps-258fps and it continued to fluctuate around 250-260 fps. I'm having it upgraded to 380+fps.
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07-09-2009, 09:35 PM
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#7
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High Performance Builds
Join Date: Jan 2009
Location: Davis, California
Posts: 4,374
Liked 249 Times on 178 Posts
Likes Given: 94
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Sounds like you have a tiny hopup seal issue.
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07-09-2009, 11:23 PM
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#8
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Supporting Member
Join Date: Jan 2009
Location: Boulder, CO
Posts: 3,239
Liked 21 Times on 17 Posts
Likes Given: 12
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It actually stoped and became consistent at around 255fps. It was weird at first but fine after a few shots. So it was cronoing 250-256-255-253-257-256-254-ECT...
AEX has it now so they will fix any problems. Other than this, the AUG is awsome!
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07-09-2009, 11:38 PM
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#9
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High Performance Builds
Join Date: Jan 2009
Location: Davis, California
Posts: 4,374
Liked 249 Times on 178 Posts
Likes Given: 94
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You got the TM right? You getting bushings installed? and anything else replaced?
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07-10-2009, 12:30 AM
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#10
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Supporting Member
Join Date: Jan 2009
Location: Boulder, CO
Posts: 3,239
Liked 21 Times on 17 Posts
Likes Given: 12
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It supposedly has metal bushings, but if not I'm having them installed with the spring. Yes its a wonderful TM. If AEX sees anything bad they will replace that too.
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