Mark,congrats on your new Parker ! When I hear about a $600.00 Parker ,I imagine a gun with many issues ,pinned stock , off face cracked forend etc. ! If your gun is tight unpinned and the Barrels haven't been shortened you did quite well on your purchase would be my first opinion sight unseen ! Just a suggestion for you to consider , before I did any thing with the chokes on the gun ,I would shoot it a bit and if it shot too tight of pattern I would buy a couple of boxes of " Spreader Loads " and this should help your pattern immensely ! Again , Just My Personal Opinion !