I've been running a Dlask made Miculek clone in .30 Cal, the one with the gaping big side ports, on all my SHORTY M14 rifles.
This design definitely does a very good job of minimising felt recoil and muzzle flip on the more powerful .308/ 7.62 ammo in the shorty 18 3/4" barrels. I do however, get a LOT of comments from other shooters beside me on the range, about how LOUD they are.
Compensater design is a lot more complicated than simply scaling up or down, and I find the exact same design in .223/5.56, doesn't seem to me to have as dramatic an effect.
Maybe there is less recoil to begin with, so the decrease is less noticeable. Or maybe there is less gas volume, or less residual port pressure left at the comp in .223/5.56, to really work with those massive gaping gas ports. So in .223, maybe smaller ports, and more of them, might provide a better gas flow "jetting" effect, which provides better muzzle flip reduction.
Way back in the 1980s, when I first started building comped pistols for IPSC, I found personal preference about "feel" had as much to do with successful comp design, as did the physics involved. Balancing the muzzle flip reduction to the shooter's personal style, and the ammunitoion, could give an individual pistol shooter nearly perfect double taps ... with the pistol coming down to exactly the correct spot just in time for tne shooter to trip off that second round WITHOUT an extra sight picture.
Obviously, with rifles, there is a different set of design parameters, and exact timing and personally tailored muzzle flip reduction are not as critical. With a rifle, especially a semi auto rifle or even a FA, you want to get muzzle flip as close to zero, consistently, as you can.
And for the .223/5.56, I'd bet several smaller gas jets precisely tailored to the loads can achieve this fairly consistently. Keep in mind that several factors, that can vary with ammunition selection, can effect the "feel" of even a rifle comp. Factors such as residual port pressure, are effected by barrel length, powder selection, burning rate, bullet weight etc.
I just picked up a bunch of the YHM combo Compensater/Flash Hider. I'll be doing some side by side testing to see how these "feel" against the Dlask/Miceluk designs.
I'll post the results.
[l;{)
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