Up to 1,000 yards, though it will cleanly kill most game animals at any distance that you can place the bullet on target. Bert H.
The 45/70 is best kept in the 0-150 yard range out of a lever gun.
4570 ,
$500 to $1000
A few hundred to multiple thousands of USD depending on EXACTLY what you have.
The best answer I can give you is to post at http://www.trapdoorcollector.com/
4570 g = 4570000 mg
There are 1000 millimetres in one metre. Therefore, 4570 millimetres is equal to 4570/1000 = 4.57 metres.
I would guess it was a musket from the civil war in 58 caliber. if it now takes a shell it would probably be the 50/70 caliber which is what all the civil war musket were converted to. The year date 1869 would fall under the conversion era of the 58 cal. muskets. The 45/70 rifle did not come into it's own until about 1873
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Assuming that milemmeters is really millimetres, 4570 mm = 4.57 metres.