Bowhunter57:Here's a link to a table I put together about a year ago of various shotgun slug/sabot ballistics.
All data was taken directly from the manufacturer's websites at that time.www.soccerweb.org/dismalacres/sabotsweb.htmMaybe others in this forum who are much more experienced with muzzleloaders than myself can provide you some ML data for comparison.
Like you said, there's a multitude of combinations of powder volumes and sabots of various sizes resulting in just as many combinations of velocity and energy.
It's going to be difficult to make an apple-to-apple comparison between a 438 gr (1 oz) 12 ga. sabot and a 250 gr. ML sabot.
That was my reason for inquiring if you were looking for a 12 ga. or a 20 ga.
It might be easier comparing a 20 ga. to a ML due to the similarity in the size of the sabots used.
All may be lethal but accuracy is key.
I have a 12 ga. USH and can attest to it's accuracy (and weight). In the field.....2 shots, 2 dead deer.
My son has a 20 ga. USH which likewise is very accurate, a pleasure to shoot, but as of yet not tested in the field.
I have also purchased an in-line ML this year but have yet to shoot it.
Having said all that, I will withold any judgment as to which one I would buy if I could only buy one.
I will say that more and more hunters are now using ML in the firearms deer season and leaving their shotguns at home.
I take that as a testimonial to their accuracy and lethality and also allows for the extra opportunity to hunt in the ML season.