Are H1000 and H4350 powders double or single base?
- Thread starter harry_x1
- Start date
awesome...do you know where I can self serve this kind of information for diff powders? Also, when you say ideal, can you elaborate what you mean by that. I understand that by higher humidity there will be more water content etc, but trying to understand why a 50% RH is better than a 30% RH. Thanks for your time and attention.
a few resources here:
Humidity Changes Can Alter Powder Burn Rates and Performance « Daily Bulletin
The leaves are falling, and that means the rainy season will soon begin in many areas of the country. With rain comes increased moisture in the air, i.e. increased humidity. And that, in turn, can affect how your powders perform by altering their burn rates.
How Humidity Affects Powder Performance — Important Podcast « Daily Bulletin
Bryan Litz and The Science of Accuracy Academy has released a new Podcast with vital information for all handloaders. This Podcast examines the effects of humidity variances on powder.
These powders 4350 and 1000 are made here. You can ask them directly if you wish.
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All ball / spherical type powders are double-based irrespective of manufacturer / origin / name on the label. (Nitroglycerin is an integral part of the production process.) This also applies to a few 'hybrid' grades such as H100V that are made in ball powder stills, but reshaped to something like sticks.
All Alliant grades are double-based. This goes back to an antitrust legislation enforced split in US energetics manufacture over 100 years ago that saw all double-based products go to the Hercules Powder Co. (later bought by Alliant ATK); all single based smallarms propellants ended up in the Dupont combine sold as IMRs now part of the Hodgdon empire and made by General Dynamics in Canada; explosives manufacture went to a third company.)
All IMR brand rifle 'legendary powders' (ie former Dupont grades) are single based. The five IMR 'Enduron' grades introduced in recent years - IMR-4166/4451/4955/7977/8133 - broke tradition and were double-based. They have now been discontinued it seems. IMR-8208XBR, although not a 'legend' type is single-based as it's made by ADI in Australia.
All Norma brand powders are double-based.
All Hodgdon extruded tubular powders (made by ADI in Australia under contract) are as @Michael Huebner says single-based. Hodgdon Hybrid H100V although it looks like an extruded grade is made using ball powder technology and is double-based as are all Hodgon's 'spherical' ('Ball-type') grades and the super-performance Superformance and Leverevolution products.
All Viht N300 pistol grades and N100 series rifle grades are single-based. All N500 series rifle powders contain nitroglycerin.
All Shooters World extruded powders are single-based bar one or two. If the manufacturer's OEM code starts with S0-something it's single-based; double-based if OEM code D0- something. So SW 'Buffalo Rifle', a speciality grade, is one of the few double-based stick types. (OEM: D0-60) The Czech manufacturers' OEMs are shown on the SW website in product descriptions.
All Alliant grades are double-based. This goes back to an antitrust legislation enforced split in US energetics manufacture over 100 years ago that saw all double-based products go to the Hercules Powder Co. (later bought by Alliant ATK); all single based smallarms propellants ended up in the Dupont combine sold as IMRs now part of the Hodgdon empire and made by General Dynamics in Canada; explosives manufacture went to a third company.)
All IMR brand rifle 'legendary powders' (ie former Dupont grades) are single based. The five IMR 'Enduron' grades introduced in recent years - IMR-4166/4451/4955/7977/8133 - broke tradition and were double-based. They have now been discontinued it seems. IMR-8208XBR, although not a 'legend' type is single-based as it's made by ADI in Australia.
All Norma brand powders are double-based.
All Hodgdon extruded tubular powders (made by ADI in Australia under contract) are as @Michael Huebner says single-based. Hodgdon Hybrid H100V although it looks like an extruded grade is made using ball powder technology and is double-based as are all Hodgon's 'spherical' ('Ball-type') grades and the super-performance Superformance and Leverevolution products.
All Viht N300 pistol grades and N100 series rifle grades are single-based. All N500 series rifle powders contain nitroglycerin.
All Shooters World extruded powders are single-based bar one or two. If the manufacturer's OEM code starts with S0-something it's single-based; double-based if OEM code D0- something. So SW 'Buffalo Rifle', a speciality grade, is one of the few double-based stick types. (OEM: D0-60) The Czech manufacturers' OEMs are shown on the SW website in product descriptions.
6.5 forever
Silver $$ Contributor
Thank you very much for providing this information!
Super thanks for this useful info. One more question. I was told that the ideal RH for H1000 is 50%. I am planning to store my H1000 in a mason jar along with a two way humidity pack of 50% RH. Do you think there might be some negative impact on a single base powder due to use of two way humidity pack? I read on this forum somewhere (cannot find that thread again) where someone mentioned that two way humidity packs might impact some kind of a sub ingredient of the powder and bring it to the surface or something.....
RegionRat
Gold $$ Contributor
I have no opinion on two way humidity packs because we never used them in the labs or factories.
This is based on being the least different from some unknown environment in the future.
For example, I live near the coast in SoCal and we mostly get onshore breezes that keep us near 50%.
But, when the winds come from high pressure in the desert and the flow reverses, our humidity can drop to single digits. When those hot desert winds stall and the hot air mass sitting out over the ocean start to just barely come onshore they bring a very high humidity so we can go up near 85% or even get foggy.
That is just the story of where I live. In a Mil-Spec world, we try to protect ammo during storage and transport, but the world is unpredictable so there is an effort to load it for an uncertain environment where it is going and the 50% point is often the least different from the variety of possibilities.
The temperature of storage will have nearly infinitely more effect on any powder you store than the humidity. Humidity affects the burn rate of the powder, but that is a reversible, constantly changing effect. Powder adsorbs and desorbs humidity based on the ambient humidity, but that doesn't effect the degradation of the powder over time to any great extent.
Temperature, on the other hand, has a huge effect over time on the storage of powder.
Also, the proper word for a pile of smokeless powder stored in a tight fitting mason jar is: bomb.
Temperature, on the other hand, has a huge effect over time on the storage of powder.
Also, the proper word for a pile of smokeless powder stored in a tight fitting mason jar is: bomb.
I use Potassium Carbonate mixed with water in sealed glass containers with my powder to maintain around 47%RH.
Container with powder stands on the "stand" in the glass container above the Potassium Carbonate/water slurry, I have never thought about light being an issue but they are stored in a cupboard.
Here's one of the best reads you'll find on RH and it's effects https://chronoplotter.com/2021/08/19/how-does-humidity-affect-powder/
Good article. This is nothing really new to shortrange BR competitors. Powder measures were adjusted though out the day to account for the powder weight change from AM to PM.
Precisely the reason many have went to pre-loading at home in a controlled environment.
However, I am not sure the reason is aBsorption of moisture, but rather aDsorption - where the water molecules cling to the surface. I would think the powder composition does not lend itself to being infiltrated by water vapor. Not sure on this because who would have thought storing barrels in PVC pipe would be problematic.
IIRC the aDsorption theory was from Mike Ratigans book "Extreme Rifle Accuracy".
Precisely the reason many have went to pre-loading at home in a controlled environment.
However, I am not sure the reason is aBsorption of moisture, but rather aDsorption - where the water molecules cling to the surface. I would think the powder composition does not lend itself to being infiltrated by water vapor. Not sure on this because who would have thought storing barrels in PVC pipe would be problematic.
IIRC the aDsorption theory was from Mike Ratigans book "Extreme Rifle Accuracy".
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