I've had a CVA Optima V2 for a year now, and like many new ML shooters I just went with IMR pellets right away. I got the gun somewhat on zero at 100 yards, but my groups were just pitiful. I basically shot up all my pellets with no luck. I've tried both harvester and mmp regular black sabots with Speer Deepcurl 250 and 300gr. I think it's finally time for me to switch to loose powder, but I'm trying to decide if I should give Triple Se7en a go, or just get the new breech plug and go right to Blackhorn 209. It seems like most people love the stuff, but a few hate it. I'm less concerned about price since even the BH209 is cheaper than pellets. I'm more concerned about stories I've read about misfires in the cold. Most of my season this last year was below 15 degrees. With the BH209 specific breech plug and CCI magnum primers will I have any issues? Or are people with issues still trying to use OEM breech plugs and non magnum primers? Anybody that has shot both T7 and BH209 on here?