Second Hand CVA Optima question

[EE423]

Purchased a good looking CVA Optima V2 50 cal with a Simmons 3-9x40 scope at a local pawn shop during the off season. Haven't been able to hunt or do much with it at all due to work.
Looked at a few YouTube videos about how to break it down, scrub and clean the inside of the barrel and the breach plug. Then reassemble with breach plug anti-seize lubricant.

Purchased Hornady Low Drag .50 Caliber Sabots, Pyrodex 50/50 pellets, and Winchester Triple 7 209 primer caps. Prepping to go to the range either tomorrow or the next day and hunt on Friday. I know, only one MZ hunt is way lower than I wanted it to be but I'll take it.
During my prep, I saw it was a good idea to fire a primer cap before loading anything up to get any remaining moisture out.
I shot with a primer only and a ton of smoke came out around the break action point and the breach plug. Repeated with another cap 5 minutes later and the same thing happened.

I may be just being paranoid but anything about that sound like a cause for concern?

 

[swampbadger]

I think that's normal for a muzzle loader. I was really nervous the first few times I shot my cva muzzleloader. I was certain I was gonna blow myself up, but 20 deer and 15 years later we are still getting along and getting the job done.

 

[Jcalder]

Headspace is slightly off. McMaster has some orings that'll fit in the plug before you put the primer in that'll snug up the fit and stop all the blow by. Doesn't hurt much as is, just messy.

 

[Jcalder]

Also, cva used to make a shim kit for the firing pin bushing. If they have them, you can adjust the bushing and not need the oring

 

[bloodtrailing]

Take a picture of the breach firing pin area and post it.