I did a little experimenting this afternoon using my TC Encore ML rifle, Black Horn powder and the Federal Premium bullets. The 209 primer was a CCI shotgun primer. My first session using this combination. The evening was hot at 91 degrees. I shot six times and each time the TC Encore .50 produced higher bullet placement. I chose 100 grains of Black Horn powder. First shot was almost a bulls eye at 60 yards. The sixth shot was about 8 inches high. the in-between shots were in order of placement always rising. I am thinking the barrel became petty warm (not hot) and this could change the placement of the bullets. The time was probably within 30 minutes from start to finish. I tried to keep everything constant and tried to always use the same HOLD while using the open sights on the weapon. Any comments or advice for the next shooting session? Cow Tag