I have had all the rimfires in H&R rifles. The 17's are my favorite.
My M2 Is by far the most accurate rimfire I have ever fires...bar none! NO BS 3/8" groups from a rest at 100 yrds! My 17HMR is very good as well at around 5/8" - 3/4", if I keep up my end.
The 22LR is hovering at, to just under one inch. I sold my 22mag Ultra. It would shoot FMJ's under one inch but nothing else! I put the plastic stocks that came on my M2 on it and the laminated wood on the 17 and kissed it good bye!
I have been a 22mag fan for many years, is a great cartrige, but not one that is super accurate as the 17's are.
I think you will be very happy with either 17 cal rifle you choose,
enjoy!!
CW