Appreciate the input guys. I have been reloading for approx 50 years, into the .204 Ruger, .222 Rem. & .223 Rem. big time these days ( as well as other stuff). Pretty much done with the big game thing now and primary focus is gophers, crows, coyotes and targets. Varmint barrels, high magnification scopes,small groups, most shooting done off portable tables & bi-pods. Load in the winter then shoot all spring/summer, load 1000 at a time for each gun. Anyway .22L.Rs & .222 Rem are the main "gopher guns" but I`m thinking that a 17 Hornet would even be better than .222 , quieter, cheaper (12 grains of powder vs 21 gr.), won`t lose sight picture on high magnification, less heat, etc. should be the ultimate gopher killer. I am not a Ruger fan, have never had one that impressed me so don`t shoot them anymore, would love to try a Cooper but not today, prefer a CZ but probably won`t find one so may have to try a Savage 25 as that`s about all that is left. Have had several Savages in the past and although they are a little "rough" they seemed to shoot reasonably well ( always better than the Rugers). Cost is a no brainer, 52 cents a round here for 17HMR vs around 30 cents a round to reload 17 Hornet. Yes, I have to "have" a 17 Hornet.
^that statement is correct Bad Bob.
My story is very similar to yours...minus the fact that I never was into big game hunting at all. I can't resist an awesome caliber like 45/70 mind you...
**WARNING~gooey photos below**
Anyhow, FOR varmint guns...I've taken advice from experienced guys who's opinions I valued, even though the advice itself didn't jive with my own sensibilities 100%. Namely, bigger=better. That had me up to .243 Win. for groundhogs here in S. Ontario. While I can appreciate 243 (and many others) I get a FAR bigger kick out of using "enough" power for the job without going nuts. My own path to groundhog-slaying greatness went like this; 17HMR, 22WMR, 223, 204, 243, 17 Hornet. I've shot them with 20ga, 12ga, 270 and probably others...but those were the varmint rifles. 22WMR worked WAY better than 17HMR. 223 (hand loads) brought more distance/accuracy to the table. 204 was about the same as 223 but even easier/flatter-shooting. 243 was excessive in every way, and never shot quite as accurately as .223 anyway. Sold the 204~didn't like the bullet weight/type it shot best (blew clear through). 243 was too loud, couldn't see the impact. Still loved 204, but had always been curious about 22 Hornet/17 Hornet. Tried finding a CZ in 22 Hornet but instead, came across some conversations on 17 Hornet. Tracked one of those down new about a year and half ago. 527 Varmint in 17 Hornet!
Determined to hand load, I bought dies...a pile of once-fired brass, CFE BLK powder, 20gr and 25gr bullets...and both of those bullet types loaded into Hornady factory ammo as well. I always use factory ammo as the first rounds through a gun (not sure why) but I figure it'll get me trying the gun faster, and extra brass is never bad. Found an OK scope/rings to put on it (planning to upgrade when $ allowed) and took it to the range. Didn't like the 25gr, but the 20gr factory ammo shot just under 3/4" MOA on a windy, cold, crappy day when I quite literally couldn't feel my fingers. This is a photo from the first outing.
I worked-up some loads using the 20gr bullets but before I got to try them, I took it out again in nicer weather and ran more of the factory ammo through it. First group was a hair over 1/2" @ 100 yards. Got me thinking that the dies/bullets/brass might not have been required!

Groundhog hunting isn't a high-volume game like gophers. That said, ask me which I'd prefer to have? lol I travel west to shoot gophers every other year. Would be EVERY year if I could swing it. Anyhow, load testing went on semi-permanent hold..and I've been running factory ammo through it since. I will go back to load development as I'd like to shoot this gun for fun as well (not just varmints).
I've had it out for groundhogs maybe 7-8 times now, and they do nothing but die when hit. Longest shot so far was 198 yards, and a mature groundhog at that. (=big) got me thinking about photos I've been shown of 17 Hornets beside full-sized coyotes that were killed with them. I very much started to believe the hype, and have since said a number of times "17 Hornet performs like people claim 17HMR does". lol Handles/carries/shoots like a big rimfire...but the results are anything but. Here are a couple of photos from last summer I think;
Will leave it with this~my 15 year old son just got his hunting license this spring and was eager to go out for groundhogs. I contemplated the .223 (he'd shot it plenty of times, and well) but since I was planning on selling that rifle to finance a 204, I decided to bring the 17 Hornet instead. Wasn't ideal conditions, but almost 2 hours in, I spot one on a compromised corner fence post...trying to get to a higher spot to watch us I think. The groundhog had caused that post to tip over (another reason farmers have no time for them) and well...seeing us better meant the opposite was true as well. We were about 110 yards away, guessing...but since it was so out in the open, I let jr. have a crack at it. It was a very good-sized groundhog, but as you can see in the second photo below...17 Hornet has power to spare.
To put that second photo in perspective, it toppled over instantly when hit...and dumped that in less than 1 second.
Anyhow, I bought mine thinking "cool, maybe it'll measure up"...but I've been more impressed with it on every outing. So Bad Bob...not sure if this was the kind of input you were after, but it's about 30 degrees out and very humid here right now...so rambling about this rifle in an air conditioned house sort of held more appeal than the yard work I have to get started on. lol
Hope it helps!