We have had a Ruger 44 mag carbine in the family since the early 70s (tube fed). I recently took it to the range for the first time - shot 3" (horiz) 1 3/4" vertical groups at 100 yards with iron sights (not peep sites) with factory Remington 240 gr lead medium load. No scope, no sand bag rests. Frankly, I was shocked - never would have believed this had I not seen it. I think with a scope and sand bags, under 2 inch groups are very likely. Groups were about 3 1/2" low at 100 yards.
I shot a big buck once with it with 240 jhp - deer was about 70 yards away, and was looking straight at me from behind a bush. All I could see was his head and a big rack of horns. I aimed for between the eyes and shot. The left antler dropped like it was hinged on his head, and then he dropped - when I got there, his head was split wide open.
What's interesting is that velocity with 180 gr factory loads is about 2,100 ft/sec or just under. I have shot hundreds of rounds with this gun of all bullet weights up to 240 gr and it has NEVER jammed. Therefore, I have a hard time believing the stories that this gun is prone to jamming. I have never taken good care of this gun - it has not been cleaned very much and has been thrown around and beat on, been under water, in the sand, etc. It has been a great gun for the long term for us and is surprisingly accurate.