Zubba,

I could spend several pages explaining why the lead sled is very bad idea for anything other than rough sighting high recoil firearms, especially for slug shooting.

However, before that you need to understand why shooting a shotgun is nothing like shooting a rifle. First off, if you do not hold a shotgun tightly and you shoot off a rest all of your shots will be high and to the left of where they would be shooting in the field. (The fact your shots were low and to the left when shooting off hand suggest that you also have other problems besides how tighly you are holding the gun. If it was a simple matter of not holding the gun down while using the led sled your shots would have been low and to the right freehand.)

Instead of me typing out a long explanation of all of the factors involved, I will point you to a basics course on this subject first... http://www.tarhunt.com/tarhunt/shooting_guide.cfm?id=1&cfid=1831879&cftoken=59294 104

Once you have read those articles, if you have any additional questions or would like any additional tips just let me know and I will be happy to share with you any info I may be able to provide.

JC

For reference here is the set up I currently test my slugs with...