My 30-30 wincheter rifle does not load from the magazine correctly. why

you need to find a magazine
and thats not that easy
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a local gunshop may have a source

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magazine are the problem with this rifle
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While we’re discussing the magazine, let me say this is my least favorite element of the rifle. The mags are straight-walled stamped metal with a red plastic follower. While their design helps them keep a minimal footprint and weight, they don’t facilitate easy loading. The springs on these are stiff, and even after thousands of rounds it’s a battle to feed them to capacity. Their shape doesn’t help either; there’s no great way to grip them and the lips of the mag are also prone to nipping at your fingers and thumbs as you feed in the tiny rounds. The only thing about the 795 that made it less fun to shoot was stopping to reload the magazines.

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Savage had a long history or caliber changes with that rifle. Anything from for .303 Savage, .30-30 Winchester, .300 Savage, .25-35 Winchester, .250 Savage (also called the .250-3000 Savage, .22 Hi Power, .22-250 Remington, .243 Winchester, .308 Winchester, .358 Winchester, 7mm-08 Remington, .284 Winchester, .38-55 Winchester, .32-40 Ballard, .375 Winchester

The most common stamp showing c3 was for 22

Not that I can find. The factory magazines for the rifle are difficult enough to come by, let alone a 10 rd. or better one.

Check which part is hotter than others, see if applying of a lubricant help in solving the jamming problem of your rifle.

The bolt should be magnetized to catch a bb. Some rifle have to load a magazine upside down to get the bbs lined up on the top with a small thumb switch. Then when you bring the bolt back the mag pickup on the bolt should take a bb from the top and load into the chamber.

Try not filling it all the way. sounds as if some debris may have gotten into your magazine tube.

Open the bolt and carefully put in your ammo one on top the other. They should "click in" and hold in the magazine. Be sure to put each shell in as far back toward the bolt as possible to ensure good feeding. If you have a magazine release door on the bottom of your rifle, be sure it is properly closed and locked. Good luck with your Ruger rifle.

I think if you watch this video you may be enlightened:

http://www.wonderhowto.com/how-to/video/how-to-disassemble-and-reassemble-an-sks-carbine-rifle-269754/

Hi type into Google, Zeroing a Telescopic Rifle site, Shooters have there own ways of doing it but you will find what is best for you depending on what type of rifle you will be using. If you are fitting it to a Air Rifle. You could Type in Zeroing telescopic site for Air Rifles.
Hope this helps