300 Weatherby Using Hogdon US 869

[weatherbee]

anyone using US 869 in their 300 Weatherby loads?

I use it in the 6.5-300, with great results. I would think being is they are the same case, that it would work with the 300.

If anyone one has a PET load that they like please feel free to post as well
thanks

 

[4xforfun]

I have a gaggle of 300 WBY's and tubes......hunting and Match. Also did lots of load development for other 300WBY's. Every one but one loves RL 25 with the 210 - 230 weight bullet. The odd one liked Retumbo.

Good luck,
Tod

 

[sable tireur]

Hodgdon doesn't even list it as a powder choice on their reloading website. Examining the characteristics of this powder, it's too bulky and slow to have any reasonable application in the .300 Weatherby. You need a powder such as the Re-25 suggested above or check some of the reloading websites to generate a list of suitable powders.

 

[4xforfun]

What weight bullet are you thinking about? With the 180 class bullet I used to use RL 22, H1000, and ImR 7828. Now they have a BUNCH of new powders out, so, the sky is the limit.

 

[weatherbee]

Hodgdon doesn't even list it as a powder choice on their reloading website. Examining the characteristics of this powder, it's too bulky and slow to have any reasonable application in the .300 Weatherby. You need a powder such as the Re-25 suggested above or check some of the reloading websites to generate a list of suitable powders.

The 6.5-300 Weatherby is listed on Hogdon's website with load data for it with US 869. This powder works well in my 6.5-300 (3550-3600) with 143 grain bullets, 1/2" MOA.

So, what I don't understand, is if the 6.5-300 is the 300 case just necked down, why isn't there load data for US 869 with the 300 Weatherby?

 

[MudRunner2005]

IMR 7977 is another great option for the .300 Wby size/capacity cartridges.

 

[WildRose]

RL26, 33 or H1000. US 869 is too slow, Retumbo way too dirty for me.

 

[sable tireur]

So, what I don't understand, is if the 6.5-300 is the 300 case just necked down, why isn't there load data for US 869 with the 300 Weatherby?

Simple fluid dynamics (or plasma dynamics in this situation), take your garden hose and open the sprayer all the way up. The stream of water is slow and low pressure at full volume. Now turn the sprayer all the way down to the smallest orifice and the pressure surges up and the stream has more force.

There is a general rule of thumb which gets applied to reloading. The smaller the caliber in a cartridge case, the slower the powder necessary to achieve proper pressure. The larger the caliber in a cartridge the faster the powder can be to achieve the pressure.

In essence, your 6.5-300 Weatherby functions at pressure with a slightly slower powder and your .300 Weatherby uses powder a step or two faster than that pressure range.

 

[weatherbee]

Simple fluid dynamics (or plasma dynamics in this situation), take your garden hose and open the sprayer all the way up. The stream of water is slow and low pressure at full volume. Now turn the sprayer all the way down to the smallest orifice and the pressure surges up and the stream has more force.

There is a general rule of thumb which gets applied to reloading. The smaller the caliber in a cartridge case, the slower the powder necessary to achieve proper pressure. The larger the caliber in a cartridge the faster the powder can be to achieve the pressure.

In essence, your 6.5-300 Weatherby functions at pressure with a slightly slower powder and your .300 Weatherby uses powder a step or two faster than that pressure range.

Thank you sir. Good stuff right there

 

[weatherbee]

Simple fluid dynamics (or plasma dynamics in this situation), take your garden hose and open the sprayer all the way up. The stream of water is slow and low pressure at full volume. Now turn the sprayer all the way down to the smallest orifice and the pressure surges up and the stream has more force.

There is a general rule of thumb which gets applied to reloading. The smaller the caliber in a cartridge case, the slower the powder necessary to achieve proper pressure. The larger the caliber in a cartridge the faster the powder can be to achieve the pressure.

In essence, your 6.5-300 Weatherby functions at pressure with a slightly slower powder and your .300 Weatherby uses powder a step or two faster than that pressure range.

But on my US 869 canister, it offers load data for a 30-378. Is that because it is necked down?

 

[sable tireur]

The easy explanation is case capacity.

.300 Weatherby Magnum = 99 grains of H2O (approx)

.30-378 Weatherby = 133 grains of H2O (approx)

You can stuff a lot more powder in the .30-378 case than you can in the .300 case.

Regards.

 

[Varminator 911]

The 30-378 and 6.5-300 both have larger case capacity to bore ratio than the 300 weatherby. It's the case capacity to bore ratio that determines the speed of powder that works best. The 30-378 and 6.5-300 are both way over bore capacity. The 300 less so.

If you neck the 378 down to 6.5 you'll need an even slower powder than any of the above. If you were to neck the 300 up to 375 you'd need a faster powder than any above.

 

[WildRose]

But on my US 869 canister, it offers load data for a 30-378. Is that because it is necked down?

It's a monster sized case necked down to .30 cal similar to the Rum and Lapua.

 

[WildRose]

The easy explanation is case capacity.

.300 Weatherby Magnum = 99 grains of H2O (approx)

.30-378 Weatherby = 133 grains of H2O (approx)

You can stuff a lot more powder in the .30-378 case than you can in the .300 case.

Regards.

And if you stuff equal amounts of the wrong powder in the big case it goes boom!