hello , i was refered to this sight from a fellow i talked to on yahoo and he said everyone here would be more than happy to help , ok long story short i recently had a tri star 1874 sharps givin to me by a fellow that owed me some money , the barrel is marked 45-70 , but following a sugestion i stuck the depth guage on my verneer caliper into the chamber and its considerably longer than 2.10 a rough guess puts it at 2.45 so im not real sure what to do with it being as my gun savvy is near zero , is it safe to shoot or should i give it back and demand the 200 bucks the guy owes me , he was fairly honest about it when he told me he had only shot about 35 rounds and he couldnt hit a barn if he was standing inside it , suggestions ... unless its a lost cause i wouldnt mind keeping it ive shot muzzleloaders since i was 12 and wouldnt mind trying my hand at a cartridge rifle ... but if its going to be a money pit ill have to move on im currently delivering pizza's for a living and dont need to spend my cash on a dead horse .. thanks