I concur. Small bottle. The round looks like a .50 BMG round (though I have never seen one with that kind of casing), and the bottle lacks the detail of a regular size bottle.
Looking at the projectile, It looks like one of the "shatter" rounds, but I'm not sure. Rusty on my ammo IDing.
Yep! the bottle is tiny, stand for 2,5 inch high. with C embossed on bottom.
The rifle cartridge is just regular 270 win cartridge with plastic tip hollow point bullet. Print on bottom R-P 270 Win.