Good afternoon.

I am new to this board but having been reading for some time. There seems to be a bunch of good information and knowledgeable people. I just had a quick question about my wolverine. I just haven't gotten around to converting to a 209 yet and was wondering if there was anything prohibiting me from shooting 777 pellets with a #11 cap. The box suggests 209's only and I am wondering why. A lack of ignition or full burn??