The MR-1 should be a great gun.
If you're having trouble finding a range, then you might be doomed to the world of NR, and in the end, the best gun is the one you can use frequently.
As mentioned, the only real downside with the Mr-1 is it's controls. They are completely: "WTF where they thinking!?!"
AR are the Gold standard of Ergo's and Control layout. However, if you aren't used to either, it would make little difference to you, and by the time it actually matters and you go looking for another rifle, you will know well enough what you want that you won't even have to ask such a question.
I'm blessed, being a member of a full features, easy going range, that is no further a commute for then it would be to go out to a good NR shooting location.
So, for me, the AR be all and end all answer, and it brings me to a happy place.