Couple of slugs

[Dlmuch007]

 

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[Joe-Dirt]

Those look like older Winchester rounds that were popular around the turn of the century 38-55, 45-70, 45-90, 45-120 all used huge bullets

 

[against the wind]

Congrats on your finds

 

[diggerdeeper]

Your listed location would suggest that these are fired bullets from a .577/.450 Martini Henry, which was Britain's service rifle through the same years as the US 45-70.

 

[Dlmuch007]

Excellent reply’s thanks

 

[Professor of Engineering]

Nice finds!