in my opinion:
Many people think in terms of muzzleloaders as being short range guns mostly due to the 'age' or 'period age' of the guns as well as to the sighting systems used on them - ie: antique looking open sights.
In today's scoped gun age, many have never learned to shoot with open sights so they don't and believe that any gun with open sights to them, is a close range weapon. Just look at the 'modern' muzzleloading game- inlines and scopes - ie: 3-9x40's being popular. To me, these aren't real muzzleoaders. They are modern guns, many are bolt actioned, that are designed to also load from the muzzle. If you have the breech tool(they come with one), you can load them from the breech.
Many of us who do shoot 'real' muzzleloaders, do not shoot them often and many people never become really proficient with their 'antique' sights.
Many who shoot muzzleloaders only shoot at close ranges when they do shoot, so they don't know or havne't learned their muzzleoader's capability at longer ranges. In the 1800's there are anecdotal notes on long shots on enemies - to 300yards, with round ball guns - and mention of bears, deer and other game out to 150yards or further. On the plains with large game and longer ranges than the bush provided, bore sizes of the day were found to be innadequate & thus, larger bores became popular - as small as.45 & up through .60 cal.
In the 1800's, English round ball guns usually were sighted to 150 or 200yards depending on the size of the ball. The really large sizes were sighted shorter - the crushers, ie: 8 bores to 4 bores.
I well remember when Taylor and I first got involved in 'organized' muzzleloading shooting.
We'd both been shooting for a number of year, and for us, 50 yards was 'close' range, while 100 yards to 200 and even 300 yards were our normal 'bulk' shooting ranges. When we went to a rondezvous and saw targets at 50 yards being pretty much their longest, with 25 yards being the norm, it was easy for us to pretty much clean up. Afterall, it was all point blank shooting. They had a couple 'novelty' shoots at 100 yards on large steel plates - good heavens that was normal range, not long range. What a blast!
Perspecitve - it all amounts to perspective - and practise - what ranges do you practise at?
If you practise only at 25 yards, pretty soon 50 to 60 yards is long range. Practise at 100 to 150yards and anything closer is point blank- it's simply a mind game- with practise making accurate hitting possilble.
Today, we shoot too many close targets and then small targets at 100 yards become difficult - they shouldn't and needn't be. We ALL need to do more longer range shooting.
For hunting large, tough or dangerous game, use that large bore (.62 or larger), learn to shoot it with it's most accurate, oiled patch hunting load - (I gaurantee it isn't 60 or even 100gr. of 2F powder) practise out to 150 yards and you will kill/drop/anchor your game with one well placed shot. The animal will drop just as quickly or more quickly than if you'd used any modern hunting rifle.
I've been there. I've only shot moose as far away as around 100 yards with my 14 bore(17.5mm), but have seen a 170 yard moose killed with a mere .54 rifle loaded with a round ball. That's 13.7mm, btw.