Contact Connecticut Valley Arms through their website, and ask for an owner's manual (they are free) A typical load for round ball would be 65-75 grains of ffg or equivalent amount of black powder substitute.
No published sn data.
Try egunparts
50-350
.223
Your Mountain Stalker .50 Rifle was made in Spain for Connecticut Valley Arms. These are lightweight, synthetic stocked traditional muzzle loaders. They sold at dept stores for about $115.
10-125 USD or so
50-100 USD
a32 caliber black power connecticut a thousand dollar
need a fair price of what it might be worth for an old richland arms 45 cal. black powder rifle with serial no. 2142
25-125 USD or so
tack driver
100-300 USD