Hopefully, after looking at the photos below you will be able to tell a clip from a magazine.

Here is a broomhandle Mauser. The broomhandle Mauser has a fixed (non-removable) magazine and is loaded with clips.
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On the left we see a magazine and on the right we see a clip loaded with cartridges.
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A Mauser Rifle with a stripper clip in the feed lips.
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a SMLE stripper clip
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an M16 magazine. There is no provision to load an M16 with stripper clips.
These are pistols magazines
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Another annoying and inaccurate mistake in terminology is the use of the word bullet for cartridge. A cartridge, at least where rifles and pistols are concerned, is the complete round. The bullet is just the pointy thing that leaves the barrel of the gun and hopefully impacts the target downrange.
Here are the components of a cartridge:

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These are cartridges. This guy apparently doesn't know the difference between bullets and cartridges.
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These are bullets
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