300 Win Mag

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pinkerpv

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I have come into possession of 20 rounds of 300 win mag reloads. the plastic container has the following written on it.

75-4350 x 180 Nos/Par. I have interpreted that to mean 75 gr of IMR 4350 powder with a 180 gr Nosler partition Spitzer BTSP..

My Speer reload manual lists the recommended powder for that bullet wt as 68-72 gr. I have searched the web for reload info and have not found any relating to 75 gr.

I am not sure where to go from here. I don't have a 300 win mag rifle and was going to sell these 20 rnds either on Armslist or at a gunshow. Canj't do that without better reload info. Any help?
 
Please do not try to sell reloads. That is one way to get sued.
It could be possible to break down for components. Or pull a bullet to confirm the charge. Even so, if it is truly 75gr of an unknown 4350, you do not know what it is. (Is it Hodgdon, IMR? It makes a difference.) The problem is that for either powder, 75gr is over the maximum published charge. On top of that, you don't know whether the brass was neck sized or full length sized - ie did the reloader size the brass to only fit in their rifle chamber.
https://load-data.nosler.com/load-data/300-winchester-magnum/
http://www.hodgdonreloading.com/data/rifle
Unfortunately, the only thing I would do with them is disassemble for components.
 
I have come into possession of 20 rounds of 300 win mag reloads. the plastic container has the following written on it.

75-4350 x 180 Nos/Par. I have interpreted that to mean 75 gr of IMR 4350 powder with a 180 gr Nosler partition Spitzer BTSP..

My Speer reload manual lists the recommended powder for that bullet wt as 68-72 gr. I have searched the web for reload info and have not found any relating to 75 gr.

I am not sure where to go from here. I don't have a 300 win mag rifle and was going to sell these 20 rnds either on Armslist or at a gunshow. Canj't do that without better reload info. Any help?


Sounds like you have reloads by another individual who thought manual maximum loads were in fact, minimums. I recommend, pull the bullets, dump the powder, and sell or give the cases to someone. I would keep the bullets, Nosler partitions are great game bullets.
 
Like the others I would not sell them. I would also break them down, toss the powder, sell/give away the cases and keep the bullets for my 30-06.
 
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