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Posted: 3/19/2006 5:24:50 PM EDT
I have decided on a Green Mountain SS fluted but unknown as to length. Help me out: could someone (who actually knows, not just think they do) explain the pros/cons between the 16, 18 and 20? thanks in advance....
Link Posted: 3/19/2006 6:58:22 PM EDT
Velocity will be highest at 16".

The longer the barrel, the quieter the sound will be.

Other than that, it's pretty much a matter of personal preference as to what you like in looks, weight, balance, stuff like that.
Link Posted: 3/19/2006 11:07:45 PM EDT
the longer the heavier

if shooting bench the longer/heavier bbl will be more stable and less prone to human error/movement/jerking so the accuracy could be better. just something i noticed.
Link Posted: 3/20/2006 8:49:00 AM EDT

Originally Posted By Snake45:
Velocity will be highest at 16".



Not necessarily. Not all 22LR ammo burns its powder by 16". Some burn slower and can take 20"+ to burn completely.

I went with the 18" figuring it would be a compromise between too short and too long.
Link Posted: 3/20/2006 11:52:49 AM EDT

Originally Posted By 00_buckshot:

Originally Posted By Snake45:
Velocity will be highest at 16".



Not necessarily. Not all 22LR ammo burns its powder by 16". Some burn slower and can take 20"+ to burn completely.


I've never seen any data to support that. I've seen several tests where they start with a 24" or longer barrel and cut off two inches at a time and highest velocity is almost always in the 14"-16" area. I've you've got hard facts otherwise, please share. For example, what brands and SKUs of ammo work better in 20"+ barrels?
Link Posted: 3/20/2006 12:28:47 PM EDT
[Last Edit: 3/20/2006 12:29:36 PM EDT by -spooky-]
I have a 20" unfluted .920 simply because I always shoot (50 & 100yard target and plinking) from prone. I always use a bipod and no rear bag. I like the extra weight, and it's very quiet when shooting subsonic ammo. A lightweight bbl. is of no advantage to me, for my uses.

From the past year or so of browsing rimfirecentral.com , I've seen that a 16" .920 can/will group just as good as the longer ones. So, to me it's more of a matter of what your needs are for the rifle as a whole.

Link Posted: 3/21/2006 2:09:06 PM EDT

Originally Posted By Snake45:

Originally Posted By 00_buckshot:

Originally Posted By Snake45:
Velocity will be highest at 16".



Not necessarily. Not all 22LR ammo burns its powder by 16". Some burn slower and can take 20"+ to burn completely.


I've never seen any data to support that. I've seen several tests where they start with a 24" or longer barrel and cut off two inches at a time and highest velocity is almost always in the 14"-16" area. I've you've got hard facts otherwise, please share. For example, what brands and SKUs of ammo work better in 20"+ barrels?



I think I read the same articale on the 24" barrel and right about 16" was the highest velocity for 22lr.

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