here is a bit of advice; though not an old timer, I have shot most all rimfires from 700 bucks on down, including the 17's.
when I get a new rifle, I never, ever, start it with a scope, if it has any kind of sites. I allways go to the 50 yard line, put up about 20-1 inch dots, and shoot away. this removes the scope in the questioning of accuracy. all screws should be checked first, before going to the range, and takedown screws, are usually good with about 20 lbs of torque, maybe 25. it is almost a guarantee, whether wood stock or not, that the bbl channel has to be dug out some more, and you cannot test this cold, you need to slam about 50 rounds down the tube, as fast as you can, to heat it up, then check the freefloat. if it is a synth stock, you need to go to home despot or some such, and get some aluminum tape, and put a few band aid sized layers, in the sides, front, back, and bottom of the receiver area of the stock; I don't care how tight your action screws are, unless that is a perfectly made for that particular rifle/ synth stock, the action will move inside of it, just a bit. The Aluminum tape acts as quicky
bedding job, to keep the action/receiver still, inside the stock.
As you know, there is a ton of 22 ammo out there, so lets narrow it down a bit, as to what generally works either very well, to excellent, across the board, in most rifles.
CCI, any rounds.
Aguila, any rounds.
eley, any rounds.
golden eagle, any rounds-last three all made by Eley.
wolf, any rounds.
American Eagle, red box, made by federal.
Winchester, any rounds.
Federal, any rounds.
Winny and feddy bulk,
AVOID REMINGTON AT ALL TIMES, except orange box and yellow
box, which are made by Eley anyway. AVOID hyper velocity rounds.
there are a few other great, and expensive rounds out there,
but if you cannot find about 10 good ones, from the above list,
you got a dog of a rifle.
Now then, we are nowhere near close to being done, once you find about 10 rounds that group very well, you need a thorough
cleaning of the bore, making sure you have removed all copper.
after all the above testing, you should easily have past the 500
round mark, since eley makes about 20 diff types, so does aguila
,so does cci, and feddy and winny put together, make about 20 diff kinds of rounds.
If you have not scoped it yet, now is the time to scope it. See now again, at 25 or 50 yards, the same 10 diff rounds make the grade. After testing these again, it is time for another fabulously good cleaning; get all that copper out.
you are still not done- you have now checked it and found it's favorite rounds, it is fully free floated, it is scoped, you checked the screws, you torqued the action screws, and you have got it down to 10 good diff types of rounds. narrow it down now to 5 favorite rounds.
Now you need to repeat all the above, everything, but this time, add a small pressure pad, up front, between the tip of the
stock, and the bbl. again, Home Despot, will have some drawer
cabinet rubber bump pads, that are small, clear, round, and smaller in diameter than the size of a dime, that is perfect for
this. Repeat all the above, with the pressure pad in place,
and see what ammo works best, again,TESTING ALL THE ROUNDS
OVER, from the start, and see what gives you smaller
groups; a fully freefloated, or padded bbl.