Welcome Asterix3.
I have a Buckmark and works great. Took about 300 rounds to break it in though. FTEs occasionaly during the break-in period. But now it hums along. I tried several different ammo and settled on "standard velocity" CCIs.
A little background. I use to buy ammo, here and there, what was on sale, what was being hyped. I've gotten older and hopefully wiser and decided to find (for each gun) what works and stick with it. No more, "Ooh, ooh, Walmarts got FedWinGold stuff for BOGO"
Taking my primary 3 .22 guns, the SV CCIs gave the smallest groups and functioned well in all three. That's all I buy. Yeah it's not the hottest, hollow cavity, super slick copper coating, but it functions and I hit what I'm aiming at. THAT SAID: You try several different brands and types in your gun and see what works best for you (after breakin of course). Even two of the same make/model guns with consecutive s/n may like different ammo.
Red Dots are easy. Buy the most expensive one just past what you can afford. You'll not regret it. EOTech or Aimpoint if you can. Working your way down the ladder to things like NcStar. I've owned most of the under $50 ones and I wouldn't waste my money again on them. Very disappointed. Check out the various shooting competitions that allow red dots. See what brands/models those folks use. That'll be a clue. Don't be swayed by be-all do-all features either. They just add complications and potential to go wrong. I'm settling on one reticle, one color, very basic. Little to break or get out of adjustment.
Alf <-- who had an uncle that worked in an asterisk factory one time. He ran the asterisk stamping machine until he fell in and made a half-asterisk of himself.