hawken

I inherited this Hawken , it's a good 40 years old. When I install the barrel wedge it goes in until flush,which makes me think it's not 'wedging' the barrel any. I've never thought the gun shot as accurate as it should and thinking this could be why ?? Do they sell 'fat wedges' ,or am I wrong...

I purchased a cheap Endoscope from Amazon a while back and used it to inspect the barrel and nipple (Musket size) on my 20 year old Traditions Hawken Caplock. The .50 Caliber Hawken failed to ignite on my last attempted shot. I was surprised how dirty the nipple remained after routine...