I had one in 17 Remington. Great shooter, no fur damage, (little itty-bitty hole in, massive internal damage, no exit). It shot great and I loved it, but it seemed like I was spending a lot of my time searching the brush for my ejected brass. Got a brass catcher from a 4m member on here. It worked perfectly, however I just couln't get used to using it. Sold that upper. I use the brass catcher(s) on other uppers.
One of my next projects will be either a 20 Practical or a 17-223. As opposed to the 20 Tactical, the 20 Practical is one pass through the sizing die, (which you have to do anyway), and load it up. No fire forming like the Tactical. I'm still looking at the 17-223 very hard as I loved my 17 Remington. Might have to build one of each in order to make a good comparison!
Good luck, the 17 is a great caliber, and ever better in an AR platform. I know a guy with an upper in 17 Remington Fireball, and he claims it is the "best" 17. My son and I both have bolt guns in 17 Remington for use when pelt prices are worth it.