swapped $2.5k of ETH into a mid-cap alt and lost $180 to slippage. am I doing something wrong?

rotated $2.5k from ETH into a mid-cap token last week. preview showed 3% slippage, I set tolerance to 4% and confirmed. ended up $183 short of the quote. pool had around $800k in 24h volume so I figured it was fine. is this just normal at this size or am I missing something?