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Old 02-05-2017, 09:22 PM
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Just restocked and did work on my >300 Weath Improved and want to work up some new loads. Had been using about 84 grains of wc860 but my boys want to wean me away from the surplus Western Cannon powders. Does RL19 or RL22 sound about right?? I load for the 300 Weatherby, .308 Norma, 264 & 7mm mags, and 300 Win Mag. What commercial powder should I start with??? Jack in Oregon
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Old 02-05-2017, 09:39 PM
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I load for .300 WB and .300 Icl. H1000 is what I settled on early in the game. Excellent velocity, load density, low pressure and accuracy for 180 grain and up.
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Old 02-05-2017, 10:13 PM
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Why?
WC860 is a current production powder from General Dynamics for 50BMG ball ammo.
If your kids think that "Commercial powder" is made by the brands they know, they are sadly mistaken. It's all made by one of a very few Defense Contractors, or Governmental defense conglomerates. At least if you are buying WC860, you are actually buying American made powder; so someone in Florida has a job.
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Last edited by Darkker; 02-06-2017 at 06:38 AM.
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Old 02-05-2017, 10:35 PM
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If it is better, then why not?

Quote:
Originally Posted by oldguide32 View Post
Just restocked and did work on my >300 Weath Improved and want to work up some new loads. Had been using about 84 grains of wc860 but my boys want to wean me away from the surplus Western Cannon powders. Does RL19 or RL22 sound about right?? I load for the 300 Weatherby, .308 Norma, 264 & 7mm mags, and 300 Win Mag. What commercial powder should I start with??? Jack in Oregon
OG32, to answer your question: Not faster burning than RL 22, I should think, but RL 25 should really be it. It is a very clean burning propellant for the rate of combustion, using chemicals to control burn rate and not graphite. No such nonsense as needing to clean your bore after every fifth shot due to unburned carbon (graphite) residue. What I could research was that it has a well below 5,000 degrees F flame temperature but good specific heat and gas production, and low carbon release. Very much in line with our S385.

In your case I would work with 22 and 25 and determine which one gives you the high end accuracy node your rifle's mechanical structure harmonises with.

Can you post a photo to show comparison of the standard and "improved" Wby cases?
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Last edited by MusgraveMan; 02-05-2017 at 11:58 PM.
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Old 02-06-2017, 03:52 AM
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IMR 7977 might be worth investigating. I've had good luck with it in my 6.5x284 norma and it seems like it's made for the cartridges you load for. it also seems to be priced right too. I often see it on sale for around $150 for a keg.


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Old 02-06-2017, 09:24 AM
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Quote:
Originally Posted by oldguide32 View Post
Just restocked and did work on my >300 Weath Improved and want to work up some new loads. Had been using about 84 grains of wc860 but my boys want to wean me away from the surplus Western Cannon powders. Does RL19 or RL22 sound about right?? I load for the 300 Weatherby, .308 Norma, 264 & 7mm mags, and 300 Win Mag. What commercial powder should I start with??? Jack in Oregon
IMR-7977 is slower than R-22/R-25 and closer to H-1000.

You spend lot of time finding loads using 860 and not sure your going to find another power just for all those rifles with same accuracy level as you now have. That's lot of work-up 5 rifles plus wear on those barrel.
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Old 02-08-2017, 07:17 PM
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thanks, really appreciated

As usual, you guys have saved me a lot of worry, effort, money and uncertainy. Many thanks. I can proceed with my (beloved) Western Cannon propellants and not feel too guilty. I shoot right out the window of my reloading shop so I can move right along without even gettin off my chair.
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Old 02-09-2017, 03:31 AM
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Before this thread goes away, I have GOT to ask: What is a 300 Weatherby "Improved" ?

I have always thought of an Improved cartridge as having a sharper shoulder, by definition. At the same time, I have always thought of Weatherby cartridges as having a double radii design. Something has to give.

Is the 300 Weatherby Improved simply the same case, with less taper, but retaining the rounded angles around the shoulder?
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Old 02-09-2017, 07:58 AM
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Jm, I guess I should be embarassed but I don't have a case from 300 Weath, Got all of my brass with the rifle or from shooting .300 H&H in it. The double radius shoulder is gone, less case taper and shorter neck I believe. The snow is above my knees and frozen, I tried to walk up to my gunshop without snow shoes yesterday and couldn't make it!! And a pin came out of one equilizing bar on the D4 CAT so guess I'll wait a month for the big thaw.
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