Does a moving gas piston affect accuracy?

C

Correia

New member
I've heard before that the auto rifles with gas pistons (AK, FAL) are going to be less accurate than a rifle with the gas going directly into the bolt (AR15). Is it something to do with the vibration of the piston above the barrel? Is there any truth to this. For example look at the Sig 550, it has a gas piston, and it is supposed to be the most accurate of the assualt rifles.

I know that rifles with pistons tend to stay cleaner and thus more reliable than direct gas pressure.

Opinions?
 
The most accurate semi-auto rifles still have roller locks like the
G3. Look at the HK PSG1, the SIG 510 (in 7.5x55mm), and some expensive
oddities produced by Sauer.

But first come really good bolt guns like the Schmidt-Rubin rifle like
the K43/57 with the whole bolt and magazine tilted 45 degree to the
left to allow scope mounting (the normal K31 is a top ejector).
 
Solidity of lockup of the bolt is probably more important than the system for gas-control. Most gas ports are close enough to the muzzle that the bullet is gone before any actual motion of the operating system begins.

FWIW, Art
 
Having shot High Power competition for some time now, I believe gas action rifles are not as accurate as bolt actions. This being said I still prefer a gas action rifle, because I enjoy DCM matches and it is much easier to become very proficient with one rifle, rather than two or three. :D

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For to win 100 victories in 100 battlesis not the acme of skill. To subdue the enemy without fighting is the acme of skill. -Sun Tzu
 
Systems like the Mini-14 exert pressure on the barrel before the cartridge is even fired. Once the barrel warms up, they really start scattering them!

Regards! DaMan
 
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