I'd say yes, as that's a fairly heavy weight for that exercise. It'd be like squatting 225 without a warm-up. Even if that's 50% of your 1RM, it's still heavy enough where, if something goes wrong and that "perfect technique" goes wonky for a second, you're getting injured.
Long story short: Either warm-up first or go super-light without a warm-up.
In the past, based on some info from the '40s and '50s, I've tried using lighter/higher rep one-arm swings as a general warm-up before lifting - like 30 pounds for 2x15-20 per arm (4 sets total). It "worked" in the sense that it got the blood flowing and I got a little sweat going, but it wasn't anything special that couldn't be done with a jump rope, treadmill, or bodyweight stuff.
Are you asking theoretically or is it something you plan on playing with?