I have no Idea what the numbers are for the energy, but my target at 200 yards was stapled to a 4 or 5 inch tree and I had under a 2" group at 200 yards and the bullets were splitting the back of that tree open, so That is energy to spare at 200 yards and I already said that would be all the farther I would be shooting, and the loose powders are what I saw guys using that say they have killed deer close to 500 yards with this same gun and basically the same bullet, but with a heavier charge of loose powder ! Someone on here said that the Remington inlines could kill them at 800 yards ! Now that is what I would call shooting too far with a muzzleloader ! I know a fella that swears he has killed several deer between 350 and 400 yards with a T/C Hawkens flintlock rifle with 100 Gr. of 2F and a Hornaday conical bullet, not sure what that bullet weighs but they are lighter than what I shoot in my inline. The 50 cal. Traditions smackdown 250gr. green Spire Point boattailed bullet ahead of two triple seven 50gr. pellets are the most accurate thing that I have ever shot out of a muzzleloader and from what I have seen they have lots of energy at 200 yards, witch is as far as I would probably shoot personally ! I have had the gun two years and killed three deer with it the farthest was 165 yards (ranged) but all of the deer I shot never ran and all shots had enough energy for a complete pass through ! A person has got to use some common sense when shooting any gun ! If you have a lot of wind you are better off not shooting unless you know the speed of the wind and the amount of hold you would need ! The same is true with "any" 1000 yard rifle, you are wasting your time if you don't know how much to hold for the wind for that 1st shot kill ! Calm day I am sure if I had a scope that had a 300 yard mark in it or knew the number of clicks I had to add to be on at 300 yards, this bullet would still have more than enough energy to kill a deer, I could probably be real close on a windy day by holding for it but would not chance a shot that far ! This thing shoots nearly as tight of groups as my Remington 700, 30-06 shoots ! Unbelievably accurate ! I had some wind as I remember the day I sighted it in and it wasn't a factor !
I shoot long range. I understand shooting long range. I use wind meters and use ballistics programs to provide me information required, including bullet energy at any given range. At times I shoot 2,000 rounds a year, strictly muzzleloader and long range. I just finished up another 5#'s of propellant that lasted 2 1/2
months.
Now I'm going to give you my opinion about the fella that is killing deer at 350 and 400yds with a flint...…. but
you say a lighter bullet than even what you're shooting. That fella is pulling your leg, or he has no concept of range. Now if you would have stated that he was shooting a 450gr, a 500gr, or even heavier bullet, that's doable by someone well versed in long range shooting. However with a bullet lighter than 250grs, that's more tale than reality.
Now for the Remington Ultimate and 800yd kills. The Remington Ultimate Muzzleloader (RUM), was modeled after the rifle I shoot, the actual Ultimate Muzzleloader Inc., BP Xpress. The RUM is its little brother.
The RUM by itself is not an 800yd hunting rifle and certainly not with the supplied/recommended bullets. Anyone harvesting an animal at 800yds with a stock Remington Ultimate **** well better buy a lottery ticket. Even with the highest ballistic coefficient bullets at over $2 each and shooting maximum charges of substitute propellant at 2,400fps, although it is possible, there are extremely few hunters capable of accurate hunting shots at 800yds. Now..... if the rifle was converted to a .45cal and with a smokeless
RATED barrel, using smokeless propellant, or extreme charges of BH209 with high BC bullets, its possible but only by the most seasoned shooters. ANYONE who thinks shooting 800yds is easy with a muzzleloader, is either a VERY well seasoned target shooter, or nuts. Even a 3mph will deflect the best bullet over 30".
I'm not attempting to say that you don't have an accurate rifle. However your rifle has its limits. I suggest you do more research on long range muzzleloader shooting, download and learn to use one of the free ballistic software programs.
Good luck.