The only primers in my neck of the woods are Winchester W209 or Remington Kleene Bore primers. So I will have to stick with Winchester. I don't think it was a clogged breech plug. Unless they clog on Blackhorn after six shots. And if that's the case I have some Blackhorn to sell.
I will try the charges up. But this rifle only has a 24 inch barrel so I am guessing 120 would be a max load. What size drill bit to I have to get to clean the flash channel again?