SOLD/EXPIRED Powder question

[jbs2014]

All

I am looking to load some 320 grain (and maybe 300) cutting edge bullets in my 378 Weatherby.

I received this load data from CE for the 320 grain bullet:

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Ramshot Magnum (Big Boy) 98.0 113.5 7.35 2766 99.6 55840 13163 1.292 ! Near Maximum !
Vihtavuori N560 95.0 104.9 6.80 2754 99.0 55840 13263 1.300 ! Near Maximum !
Accurate MAGPRO 95.5 109.7 7.11 2751 98.1 55840 13431 1.307 ! Near Maximum !
IMR 7828 99.4 104.4 6.76 2747 99.3 55840 12864 1.289 ! Near Maximum !
IMR 7828 SSC 94.0 104.4 6.76 2747 99.3 55840 12864 1.289 ! Near Maximum !
Alliant Reloder-25 100.0 107.5 6.97 2732 100.0 54166 12316 1.314
Alliant Reloder-22 95.2 104.1 6.74 2730 99.8 55840 12695 1.307 ! Near Maximum !
Alliant Reloder-19 92.2 99.7 6.46 2691 99.7 55840 12071 1.302 ! Near Maximum !
Vihtavuori N570 100.0 114.0 7.39 2678 94.4 47524 14161 1.394
Hodgdon H4831 97.5 102.4 6.64 2677 98.8 55840 12034 1.298 ! Near Maximum !
Hodgdon H4831 SC 93.7 102.4 6.64 2677 98.8 55840 12034 1.298 ! Near Maximum !​

Do any of you have any experience with any of these powders? Any you like more than the others? Any advise would be greatly appreciated as I am very new to reloading.

Barrel length of rifle is 30"

Thank you for your time

 

[RockyMtnMT]

I think all of them are good options. Some of your decision will probably be made by what you can get.

I look for a powder that I can get very close to full case without compressing the load very much. Slight crunch of the powder is ok.

Steve

 

[Engineering101]

jbs2014

I have all of those powders except the VVs (too expensive in my opinion). I would not use the RL powders listed (to temp sensitive) though Aliant does make others that are temp stable (RL-23 for example). Of those listed I'd go with Ramshot Magnum. It is high performance and very temp stable. Shoots lights out in my 338 RUM.

 

[Grumulkin]

The powder I'd try first would be H4831SC.

 

[bwilber]

I'm with Engineering101 , Ramshot magnum is by far the most accurate in my 7mm RUM and my 300 RUM and seems to not have the recoil of retumbo .

 

[jbs2014]

I'm with Engineering101 , Ramshot magnum is by far the most accurate in my 7mm RUM and my 300 RUM and seems to not have the recoil of retumbo .

Does Retumbo work in 378 Weatherby? I have not seen any loads for it. I am leaning to the Ramshot

 

[sigsupermatch]

I use the VV in my 300 wby with excellent results, temp stable, seems cleaner also. As stated by others the RL22 was very temp sensitive during the summer months. Had not luck with the IMR. I have heard good things about RL25 going to get some at try it. Enjoy, experimenting is the most fun. Just start within the lines.

 

[jbs2014]

I think all of them are good options. Some of your decision will probably be made by what you can get.

I look for a powder that I can get very close to full case without compressing the load very much. Slight crunch of the powder is ok.

Steve

Steve

So would this load be ok?

Ramshot Magnum (Big Boy) 98.0 113.5 7.35 2766 99.6 55840 13163 1.292 !

I think that these were computed for a 26" barrel, what sort of velocity increase would I get from a 30" barrel do you suppose?

 

[Grumulkin]

I actually shoot a 378 Weatherby. No brake either.

Not to say other powders wouldn't be as good but I doubt much better.

 

[jbs2014]

I actually shoot a 378 Weatherby. No brake either.

Not to say other powders wouldn't be as good but I doubt much better.

Nice

What velocity are you shooting those at?

 

[Grumulkin]

I've never chronographed the load but I think fast enough.