Which caliber is this?

[Tusker]

Hi everyone!
So, I bought a bulk pack pf ammo and among all the 375hh mag, I got 40 rounds of these necked down bullets.
Can anybody tell me what caliber is this?
Basically is the same shell of the 375 hh mag but with a little proyectiles more similar to a 30-06 but shorter.
The silver bullet, to use as a reference is a 375hh mag 300gr solid federal

 

[Doug Hamilton]

Hi everyone!
So, I bought a bulk pack pf ammo and among all the 375hh mag, I got 40 rounds of these necked down bullets.
Can anybody tell me what caliber is this?
Basically is the same shell of the 375 hh mag but with a little proyectiles more similar to a 30-06 but shorter.
The silver bullet, to use as a reference is a 375hh mag 300gr solid federal

.300 H&H maybe?

 

[Tusker]

.300 H&H maybe?

Maybe. Have never seen one in person, only online.
Isn’t it tiny?
I’ll some more research.
Once the mystery is shorted out I’ll do a give away.
Stay tuned to all the ones interested on these

 

[Ontario Hunter]

Michronometer the bullets. You can by a cheap digital one at most hardware or car parts stores.

 

[roklok]

Looks a lot like 300 Weatherby formed from 375 brass.

 

[Bullthrower338]

The case looks like a 375 formed to 300 WBY prior to fire forming but that bullet, if fired in an actual Weatherby chamber would have exactly 1.2 miles before contacting the lands! Pull it down and mic it out.

 

[Ontario Hunter]

I agree. Probably 300 Weatherby. Not enough taper in the case and shoulder for 300 H&H. They wouldn't fit in 300 H&H chamber. Also agree the bullet does not appear to be seated properly. Never shoot someone else's loads, especially if they look sloppy. Isn't there a way to fire form the case without shooting a bullet? 300 Weatherby case is 0.025" shorter than 375. It appears they were trimmed but should check it.

If OP is considering reselling, he should pull the bullets, punch out the primers, and sell brass and bullets separately.