All you guys selling your MK11s are making a knee-jerk decision. There's nothing wrong with these guns. Once tuned that way you like, what do you need more adjustment knobs and other junk for? Oh yeah, I forgot the quest for more velocity. Maybe you should consider a powderburner
Agree... Once they are tuned the way you want, what does it matter? The larger plenum is probably only beneficial in the .357 version, or .30 trying to get over 120 FPE.
Yes, in the "quest" for more velocity, shooters tend to forget that accuracy trumps all else, and the higher power your gun, the harder it is to be accurate. There literally is no substantial benefit to shooting slugs over 900 FPS... Unless of course they are more accurate at higher speeds, which is not what I have observed. I shoot my .25 Impact X w/PP with 43.5 NSA at 885 FPS. Could I go faster? Of course, I don't even have the hammer weight or stronger hammer spring in my gun. But would it be better for hunting out to 250 yards? Probably not. To get slightly less drop, I would sacrifice a lot of shot count, and the gun would be significantly harder to shoot - and it would effectively be (for me) less accurate...