Down the rabbit hole

Thanks

No air rifle pellet is for self defence. You would be better off hitting them with the rifle.
If you are shooting short distance paper targets, try a few differnt flat nose pellets. (that is what they are made for and tend to be accurate)
But try a few differnt brands of pellets one might work better.
After that a round nose pellet would probly be your next best choice. If you are just shooting targets you don't need pointy or hollow nose pellets, or ones with spikes on the end. They are not as accurate for target shooting and just a waste of money.
Look up what pellets people like.
I tried a lot of cheap pellets and now buy better quality ones.
But having said that some guns will shoot really good with cheap pellets.
Check your pellets for damage before you shoot them. A damaged pellet will not shoot strait. Especially if the skirt (back of the pellet) is damaged.
Thats me for now.Im going to bed. Hopefully some of the other ppl will help you with information.
Listen to them. A lot of these guys target shoot, a lot of these guys build guns and tune their own guns, they know what they are talking about and are way more qualified than me to give you good advise.
2 things you need to get out of your head.
1: having a speedy pellet or high fps. It means nothing for you at the moment is what a gun shop uses to sell you a gun. Later on you'll learn how to use it for seeing what arc your pellet takes, or how much energy a pellet has down range but for now you should learn the basic stuff.
2: using an air gun for self defence is not something that you should consider when buying an air rifle. If you use an air rifle in self-defense your going to get in more trouble than you want with the police. They will treat it the same as using a powder rifle. Everytime someone uses a air rifle for stupid stuff like that it gets closer to us loosing the right to use air rifles with out a license.
You could very well end up with someone coming back with a proper gun and you won't win that fight.
Its not hard to tell a break barrel air rifle from a powder gun. If you pointed one at me I'd take it off you wrap the butt around your head several times then call the cops on you.
We are responcable gun users and will alienate you pretty fast if you keep going on about it. This isn't America.
I'm off to bed. Good night

just have a hold of Storeger RX40... still feel heavy. Can feel the weight so clearly...

 Saw you saying that have a Gamo magnum.

It doesnt brake the glass, it shakes the internal parts loose like the cross hairs and the focus and will not hold on zero. you should check if the scope is air gun rated or not. the recoil from the piston is very hard on scopes and even more so on the low end quality guns. You get what you pay for.

Probly not a silly idea. A spare scope is always handy in case one fails.
I kept my gamo scope, and are using on 1322 till I can afford another one, after the gamo killed the $300 gun City air rifle rated one I put on it.

Do you spend any time researching stuff?
A rifle scope has moving parts in it.
Those moving parts are made to take recoil (you know the unbelievable recoil of your umerex)
In a powder rifle they are made to take a backwards recoil, because that is all a powder rifle has, backwards recoil into your shoulder.
In a spring or gas ram air rifle there are two types of recoil, a forward one as the piston hits the end of the cylinder and the backwards one like a powder rifle has.
As a powder rifle scope is only made to take the backwards recoil and not the forwards recoil, this means if you put a powder rifle scope on on a spring or gas piston rifle everytime you shoot it, it will get a jolt forward as the piston hits the end of the cylinder, which the scope has not been made to take. This will eventually shake the moving bits inside and they will come loose. When this happens the the cross hairs will move and won't be where you set them too. You won't hit where you are aiming because they have moved.
In an air rifle rated scope they know that there is a forward and backward shock to the scope, so they make the moving bits in the scope to be able to take the forwards and backwards jolt that happens in a spring or gas piston air rifle. This means that the moving bits in the scope don't shake loose and the scope stays on target.
Thats a very basic description.
Get on the Internet and look it up.
Guns like the gamo magnums have a very heavy recoil and are known to break (shake the moving bits loose) scopes that arnt well made even if they are for air rifles .
Before you ask, an air rifle rated scope can be used on a powder rifle.
It is not a good idea to use powder rifle scope on an air rifle.
Pcp and pump up air rifles do not have to use a air rifle rated scope as they do not have a big heavy piston crashing into the end the cylinder when firing a shot. So that don't have the a big forward jolt like a spring or gas piston.