if it is a plunger style rifle.. and I am almost certain it is.. that is not made to shoot BlackHorn 209. I tried Blackhorn in a Thompson Center Black Diamond and ended up digging a primer out of my forehead. So be warned. Also with conicals you create a tremendous back pressure, so if it is shooting #11 caps it will blow them back at you. If it shoots 209 primers again, be very careful. Wear shooting glasses for sure.

80 grains would be maybe a little hot for that conical. I shoot that same conical with 80 grains of Triple Seven and I was told that BH is pushing things even hotter then Triple Seven. I'd start at 70 grains and try that.