With the same bullet, a Hornady 52 grain HPBT, I was using 38.5 grains of H380 and seating out to the lands, minus about .005 and all cases trimmed to minimum length. I had a 26" heavy barrel with an 8x32 BSA Platinum. I was cutting a ragged hole at 100 yards with letting the barrel stay cool. I had rubber faucet washers between the fore end and barrel and was shooting ground hogs at 600 yards plus. I couldn't use a bipod due to the pressure on the barrel and zeroed it with resting it on the frame and trigger guard. My Encore was a shooter and one of the first ones produced. Good Luck!!