The "secret" to high performance with the SSX is that it must be "deep cleaned" prior to being shot. It comes with a very tough preservative in the bore. If that is not removed, it will never shoot to its potential.
I've used various products to remove it. Brake cleaner and a good brass choke tube brush work very well, as does a lacquer thinner soak, followed by a good scrubbing with the brush. When you're through, the bore should shine. If not, it's just not clean.
I now follow-up the cleaning process with Gunzilla BC-10 and use that exclusively after I have the bore shining. It will prevent the build up of carbon or plastic better than anything I've tried.
That choke also shoots better the more it's shot. It has a break in period and you can use any type of shells to break it in, not necessarily turkey loads.
If you've already shot that choke prior to deep cleaning it, it's a little harder to clean but the same process will work. To save some elbow grease, you may want to use that choke tube brush with an electric drill to clean the bore. It helps.
"If he's out of range, it just means that he has another day and so do you."