I tested one out this summer. I haven't muzzy hunted since I was 10 years old. 25 years later and the muzzy world had changed a ton. I had a tag for Colorado mule deer and had to use a conical, can't use sabots there. The gun would shoot half moa with some loads I tried. With the 250 grain Aerolite on top of 100, 110, or 120 grains of BH209 all the combo's were 1.25 moa or better. I honestly didn't have to do much for load development since the gun was so accurate with whatever I stuffed down the barrel. I ended up using the 250 Aerolite with 120 grains of BH209 going 2358 fps. Sighted dead on at 140 yards I was about 2" high at 75 yards and 4.5" low at 200 yards. Able to hold almost dead on from 0-200 with a muzzy is kind of cheating haha.
Here is my Colorado buck and the Cooper
Here is the rifle while working on the load this summer.
Here are targets from different bullets or powder charges that I used.
I haven't heard much about the Cooper 22ML. But from my sample of 1 I am extremely impressed. The rifle is accurate and super easy to shoot. It has a nice stock, trigger tech trigger, and it's way more accurate then I am. The test target Cooper sent with it was almost 1 hole. They used a sabot but like I said I wasn't allowed to in Colorado. I have no clue about the Remington muzzy. But it would take a lot to get me to switch to a different muzzy after seeing how accurate this cooper is.