I've never heard of making dowel on a bandsaw. I created this post to reflect methods I've used and therefore it wasn't mentioned.
To be honest I'd never use a bandsaw anyways. I'd be concerned that there isn't enough blade mass to minimize flexing and twisting while pushing the dowel through and maintaining accuracy. Not to mention safety. 
I generally keep stock length to 18" and less. If I'm going to go longer I make sure I can hold or grasp the moving dowel output. Sometimes I've even used an output holder spaced "x" distance from die output. 
Feed rate or speed should be consistent. Experience eventually provides memory or feel that becomes fairly consistent. 
My goal is to output dowel that needs no sanding. There is zero control on consistent finished dowel diameter. You want your die to produce accurate consistent diameter output without the urge of sanding.