I was trying to make a similar decision a couple years ago, minus the .45. I ended up going with
Dead Air Sandman S, Sandman K and Wolfman. That basically has me covered for everything except .45 and .22LR. If I were to do it over, I’d replace the Sandman K with a .22 LR can like the Mask for my first go-around. The K is too much of a compromise to be a multi-purpose can. The
Sandman S is a great universal can with only drawbacks being weight and locked into KeyMo muzzle devices. I’d have no problem recommending Sandman S and Wolfman as first cans except for the .45 cal.
I shoot left-handed and use piston-driven ARs to minimize the gas blowback.
I can notice the increased back pressure in the Sandman S over the K. If noxious gases are a concern, then the flow-through cans recently introduced are really attractive. The
Huxwrx Flow 762 Ti seems to be an amazing can from all the reviews and weighs only 12 ounces. It could very much be the best rifle can for everything from .223 ARs to .300WM bolt guns.
One drawback to Huxwrx is the cost and availability of muzzle devices.