75-100 grains of powder.
CVA stands for Conneticut Valley Arms. You have a reproduction of a Colt.
The CVA 45 caliber blackpowder with the serial number 0025524, could only be 2 years old by the year 2014.
No published sn data.
Black powder, or a BP substitute such as Pyrodex. NEVER use smokeless powder. For bullets, either a lead bullet made for muzzleloaders, or a muzzleloading sabot and matching bullet. You need to read the owner's manual. If you do not have one, contact CVA thru their website.
CVA is s reproduction gun
There are no known date codes for CVA, but with a low serial# such as yours it is obviously early in that models production. IF the model was known I could give you an idea of the year based on when production started. If you need help with identifying the model the online auctions like gunbroker, auction arms and proxi bid are good research tools. Enter what you know in the search (CVA .45 black powder) or (CVA 45 muzzleloader) and compare photos to what you have. You may have to search archives or completed auctions, but you should have good luck.
Connecticut Valley Arms(CVA) is a modern manufacture that makes replica BP guns and guns of its own design. Model 1851 refers to a Colt pistol made in 1850's. A Colt gun would not be marked "CVA".
I believe you have a CVA Blazer. The barrel and possibly other parts were made in Spain. The nipple is located in the center of the breech plug-a forerunner to today's modern inline muzzleloaders. CVA was offering a recall on these guns-if you've ever fired it you'll know why. If you haven't fired it I recommend you don't-the nipple could possibly blast free and injure or kill you!
Kits were made by Connecticut Valley Arms Otherwise known as CVA
I believe those were made in Spain for CVA, and taken over now by Traditions.
CVA was only a seller of Pistols they did not manufacture them selves I would say it is a repo of a navy revolver if it is a 36 cal or a 44 cal 6 shot revolver they had a ship engraved on it. It is a functional reproduction made in the late 70's. It will shoot a .454 ball with 30 grains of black powder. It was sold as a confederate model 1850 navy.Original black powder firearms will never be marked "Black powder only", since at the time, that was the only form of gunpowder. As said, your CVA is a modern reproduction.
The CVA website has a downloadable user's manual for your rifle. Go to cva.com, FAQs, scroll down to user's manual. Read the entire manual before attempting to shoot your rifle.