Ball Chop 98C/Cyclone/RT

I have a 98 Custom with response trigger and cyclone feed.  I am chopping balls like crazy (NOT breaking in the barrel).  I can see that the balls are getting caught in between the bolt and the body right where the balls are feeding in.  But I can't tell if they are feeding too fast or too slow.  Is there a way to diagnose this problem further?  I took it apart and cleaned/oiled everything, and it's still doing it.  I am tempted to just take it to my local shop, but if this is an easy fix, I would like to attempt it myself and save some money.  Here's a pic.  Not great quality, but I think you can see where it's getting stuck.

EDIT: I am also having problems with having to recock. 

Edited by danw77 - 14 March 2008 at 7:43pm

The balls are brand new, good quality, and not swollen.  They fall into the breech without any resistance.  I have been able to determine that the recocking issue is being caused by the shell of the ball jamming the bolt.

I had forgotten about that heavier spring for the R/T.  I'm probably due to replace some of those parts later this summer, so thanks for reminding me.

I also have a 98 Custom with the RT and Cyclone and a J&J Barrel and a The Adapter for the Cyclone and RT and a Expansion Chamber and a Double Trigger. And the gun works real good.