How to say "actually, strictly speaking" in Russian?

Собственно

"actually, strictly speaking" is Собственно in Russian.

Собственно means "actually, strictly speaking" in English.

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Word #3097 of 4,000 by frequency in Russian — level B2.

Example

Собственно, я хотел спросить тебя совсем о другом.

Actually, I wanted to ask you something else entirely.