How do you cold call vets structure short, concise, and compelling value props/meat of a phone call?

For all the seasoned vets crushing quota in SaaS sales - Do you guys have any advice on a general skeleton of a compelling yet direct message that will inspire a conversation from a cold call? I often get a gut feeling sometimes that my value prop is too lengthy and feel salesy. Inevitably, that call will lose momentum and end in a hang up.

I understand that there isn't any magic bullet and there are always some people that will be more open to a random stranger calling them but where have you guys found the most success particularly with Director - C-Suite level after getting permission to carry on with the call?