Ive got a colonial 58 and a woodsrunner 54.
I ran them both pretty hot.
Shot a few deer with the 58 cal. 110gr 2f. Just poked a 58 cal hole in the deer, pretty underwhelming damage, ball slightly deformed but not much. Im guessing 1600 fps, but not sure. Had an elk hunt get western in the worst way possible. Turns out I was blowing patches and likely thru a shot 6" higher then anticipated about every 5th or 6th shot. I started putting a felt wad over the powder to protect the patch. Seemed to help.
Got the woodsrunner. Pretty sure I was getting near 2000 fps with 105 gr of 2f. Everything that thing has touched was ko'd. 1 mule deer buck at 110 yards (spine), 1 whitey doe at 75 (frontal, ball curved to the right and stopped behind shoulder). And 2 javelinas, one point blank, one at 35 yards which surprisingly caught the ball. The balls flattened out dramatically and dumped energy. Might be the most damage from a muzzleloader ive made.
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All that being said... ignition has cost me 2 elk. The learning curve is steep (im self taught on this). And you can do everything right and still have issues. My last hunt, lightly rained on us in the morning. Did my best to cover the gun and swap prime frequently. Caught one bedded. Primed and pricked, made my stalk. He caught me at 75. Stood up and stepped towards me. Went prone. And slight delay

. The slick brass butt plate on my kifaru strap slid upwards on recoil (which i did checker a little bit, but not enough). Missed low best I can tell.