You are spot on — each barrel likes different projectiles.
But before you buy one of each available in .22cal — easily over 100

—
here are some principles that will make your selection easier (and cheaper

).
Domes (round nose) have a higher BC, and therefore less wind drift.
This is significant if you have any kind of wind — because unlike firearm projectiles the airgun pellets have a terrible BC.
Below I attach a comprehensive pellet BC table. Missing on that table are the
Dead Center pellets from JTS — those just came out and are getting good reviews.
Quality of the manufacturer:
You get high quality¹ from:
● JST (Dead Center), RWS, Norma, SIG, Crosman
And highest quality¹ from:
● H&N and JSB (incl. Predator)
If you want ultimate precision, especially for extended ranges, it's worth spending the extra pennies, it's not a whole lot more like with firearms ammo....
Weight is important, because again, unlike centerfire rifles, airguns don't have immense power — and springers (gas spring or steel spring) like your gun have even less power.
Note however that you bought one of the most powerful springers out there.
➠ This low power will make the trajectory rather steeply curved.
➠ And that will require you to make elevation adjustments often.
➠ And that will also require to range your target rather precisely.
➠ ➠ So, to reduce this somewhat, and to extend your
point blank range — it helps if your
projectile is not very heavy for caliber (and for the power you have available).
▪ For your power level (28-30FPE), and
▪ for your caliber (.22), and
▪ in order to avoid getting too close to the speed of sound which will make your pellet loose precision (max. around 950fps),
➠ the typical weight range of available pellets would be:
From 14.3gr (cheap Crosman)
to 25.39gr (JTS, JSB)
It pays to shop around. Some sellers have deals like Pay-3-Get-4. However, they only give you the cheapest pellet tin for free.
If you buy a variety, it's better to buy from a seller with low prices to begin with, like
www.TrenierAirguns.com
Packaging of pellets is critical during shipping, because bent pellet skirts translate into fliers and misses.
Amazon is the worst offender of the bunch. Sellers who specialize in airguns are usually much better.

You didn't ask, but just to make sure you start out well:
Airguns of the
springer type like yours are extremely harsh on scopes, because of a double recoil (unlike firearms).
Magnum springers like yours are
scope killers.
Ask in the forum about this particularity. You don't want to ruin your nice scopes.

Airguns of the
springer type like yours, because of the double recoil, have a special technique for shooting them, and this will be even more important for a magnum springer.
The technique is called the
artillery hold.
Again, ask the forum.
BTW, you might get more advice on springers at the GTA (
www.GatewayToAirguns.org).
You'll have lots of fun.
Matthias
¹That's my opinion, I don't have scientific proof. However, in the pellet reviews of Hard Air Magazine certain brands score high, and other don't.

Attachment
BC Table .22cal View attachment 466381