22" vs 20" barrel length

Is this going to be a competition target gun? If not the difference is going to be so small to be unnoticeable to the average joe. If this is going competition target then it would be better to purchase an aftermarket competition barrel then take a saw to a stock barrel. The harmonics of a barrel is only important if you are going to fine-tune a round for it, the perfect bullet, powder, etc. and make it the same every time. Most factory ammo is not made to nearly tight enough tolerances to matter. For large caliber competition shooting, many guys will make (or have made) each bullet by hand on a lathe to get the exact standards they require.

So short answer... barrel length MOSTLY (99.9%) only effects bullet velocity. If your buddy shoots 1" groups at 100 yards, he is still going to shoot 1" groups at 100 yards. There is a lot more to this than just the length too, is it bedded (and if so, how?), is it floated, what lug is he using, etc etc. If he wants to cut (or doesn't) based on accuracy, then don't worry about it. 2" won't matter enough.

Mike (and his .02)
 
Don't you gain some potential accuracy with shorter barrels because they're stiffer and less prone to harmonics (i.e. barrel-whip)? I'd been led to understand that short barrels will whip less than long ones, making it more stable and therefore more accurate.
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Everything being equal a stiffer barrel will be more accruate. Cutting a barrel shorter will make it stiffer. But a long barrel can be just as stiff, it just needs to be thicker. You cannot add material to a long barrel to make it stiffer, but you can shorten a barrel to make it stiffer.

A difference in 2" is not going to make enough of a difference in either stiffness or velocity to worry about.
 
Take it down to 16.5".

It is much easier for legal reasons to make sure it is at 16.5" and you will never know the difference in practical use.
 
I've got the 16.5 inch barrel on one of the other rifles, and that rifle has quickly become a favorite. But...I'd rather have an 18 inch barrel. If I ever rebarrel that one, which I've considered, it won't be a 22 incher. I might go with 20 inches. That would still be light and handy.
 
http://thefiringline.com/forums/attachment.php?attachmentid=77697&d=1326819682
i shoot sub moa regularly at 200 yards with my 16inch factory barrel 1:9twist, i would say good ammo and shooting technique is your best friend. Practice till its second nature.;) Even cheap tulammo does its job at 200, its all in the trigger squeeze,eliminating excessive movement, and repeatability in your posture. why are you cutting it? i dont see the need?? what twist is your rifle?
post a pic of what it looks like now.
 
after

After pics
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IMAG0033.jpg

31638E29-ED7C-4267-9F2F-C79B4627F57C.jpg
 
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