I've spun apart bullets in a 1in7 twist chrome lined Colt. The jackets tore apart, and the bullets either vaporized in flight, or created huge (1'+) groups downrange. My rifle did this even with 55gr Winchester FMJs if shot at over 3000fps in a 20" barrel. But that's a relative oddity. Many people shoot 50gr HP varmint bullets in their 1x7s just fine.
It's possible that your 1x7 could destroy bullets, but besides the twist it depends on how rough the bore is, condition of the bullets, velocity, and the type/construction of bullet as well as weight. No one here can tell you which bullets will work for certain, and which will fly apart in your rifle. The safe answer is to avoid thin jacketed varmint hollow points under 50-55grs when shot at maximum velocity. Thicker jacketed bullets like the 52/53gr SMKs almost always work fine. Even my Colt shot those well.
