We went relic hunting this last weekend and one of the bullets I dug up was identified, I thought by one of my hunting buddies as a 45-70 bullet.  Once I got home, I took my calipers and it measured 0.515 diameter.  That is too large for a 45-70 bullet.  Can someone help  me and tell me what rifle shot this bullet?  It has a slightly cupped base, but not like a Minnie ball.  Whoever shot it, hit something, so the nose is deformed, so I do not know if it was a round nose or flat nose.  Could it have been one of the variations of the Sharps rifles?
Weight....443.5 grains
Diameter.....0.512-0.515
	
		
			
		
		
	
				
			Weight....443.5 grains
Diameter.....0.512-0.515