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AR15.COM
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2/5/2011 3:54:28 PM EDT
I've had my M16 for just over two years and this past 3-4 times I have taken it out I have only used a .22LR upper on it and the ROF is near 1000 rpm.  Well today I shot both .223 and .22LR

When I shoot the .223, I'm thinking to myself it's pretty slow like I wanted to give it a kick to go faster.

Is this normal if you start shooting full auto all the time that you start to realize the ROF difference, depending on the caliber you are shooting?  Or even the gun?
2/5/2011 5:36:42 PM EDT
[#1]
Quoted:
Is this normal if you start shooting full auto all the time that you start to realize the ROF difference, depending on the caliber you are shooting?  Or even the gun?


Yes
2/6/2011 11:32:00 PM EDT
[#2]
Using lighter buffers and shorter barrels and hotter NATO ammo will increase rate of fire But yeah all .22lr machine guns run very fast, like around 1200RPM's. If you want a buzz gun I would pick up a MAC-11 or Mini UZI to get your fix.
2/7/2011 6:31:56 AM EDT
[#3]
Quoted:
Quoted:
Is this normal if you start shooting full auto all the time that you start to realize the ROF difference, depending on the caliber you are shooting?  Or even the gun?


Yes

+1. After awhile, you get to be pretty accurate at reading the rpm right down to, say, 25-rpm segments, just by shooting or by sound: 675 rpm will sound and/or feel different than 700 rpm.

That's why I usually take my full set of buffers to the range: If you want to speed it up or slow it down for a mag or two, it's as easy as swapping the buffer.
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