I have never tried my r9 at such distances either. I would never guess I would shoot 4" groups at 50 ft since I can't shoot 10" groups at 21 ft : ))
I haven't given up on my R9 for reliability YET. I also really favored the lawman and gold dots. They did the best in mine before I damaged mine at about 350 round (+however many the previous owner had through it. I would guess about 150 from the looks of it)
I will look forward to getting it fixed and trying to see if it's reliable and durable and accurate after repairs. Should be less than a year I hope. Until then the solo just keeps proving to be what a micro CAN BE. it's not as small as the R9 (which I honestly think they could have done by shortening the barrel) but that's where the comparison ends for me and my R9. I understand that there are some better than others though.
All that being said I do not find a fault with my solo after 1250 rounds through it. It's a sewing machine that has earned a degree of confidence only reserved for bigger black polymer guns that start with a G and revolvers.
I am obviously no writer for guns and ammo or some other type of guru. Just a picky guy who wants to carry something I can trust is going to go bang when called upon to do so and is compact and user friendly enough to carry every day everywhere. Kind of a narrow window of tolerance, but the kimber solo fits through it. maybe your R9 fits through it. Maybe not. Mine doesn't, but there good and bad ones apparently. I understand there have been some reported bad solos too. The difference seems to be the factory support.
Also, I should say I only own one other kimber to date (ultra carry II) so know I'm not a fan boy. I just find it to be more than expected in every aspect. I'm actually a sig fanboy, but after owning the 938 and 290RS I can say they don't really compare to the solo for EDC FOR ME.
One word of warning if you are thinking about buying one: I should have gotten the $1150 defensive package in retrospect. I have close to that much invested in mine and still don't have night sights. I do have some extra mags and crimson trace grips though.