Everyone is stating valid points. I don't want to do this if it won't fly. As for the weight. I am building carbon fiber tubes which are .039 grams per cm2 so when I multiply the surface are of the cylinder, it will be light. I know I can keep the weight down but if it looks too close I won't even try it. I can use a smaller mandrel and scale it down with no trouble.
I appreciate everyone's comments about the possibility that is won't get off the rod with enough speed to be stable. I certainly don't want a long burn motor on the ground causing trouble.
What ever I build, if the weight does not match my estimate by a larger amount I will move up on the power.
My original question was this. Let's assume that I actually can built it light enough, around 300 grams. Will the ejection charge on the motor have enough push to deploy the chute or will the volume of the tube be too larger?
As for why, I have watched hundreds and hundreds of rockets shoot of the rod so fast we almost don't get to see anything. I don't really have a thing for going as high as possible. This is just an idea to see something a bit different. I understand I can't get the same effect of a Saturn launch.
Again, I appreciate everyones comments regarding safety.