I have the cost of almost all rifles pistols and ammo I will post more soon when I have it all worked out for now Remington 1877 cataloge
Double derringer cost $8 to $17.30c Pearl engraved and plated. $1.50c for 100 rounds. (rim fire 41 short) Can't find my specs 45-70 Gov seems to read about $30 per 1000 rounds. 44-40 costs about $19 per 1000 rounds more (with accuracy) tomorrow.