Hybrid 100V Temp Sensitive?
- Thread starter bteate
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Wyo7200
Handloader
- Aug 20, 2014
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Very well could be. I remember someone saying the powder company's definition of temp insensitivity is extremely vague.... I've been doing a lot of warm weather/ cold weather test and modeling in quickload with all my caliber's. I can say with some confidence that Alliant powders (r17,r22,r25,r15 so far) have a ~40* range of temperature before you'll be out of your barrels node. H335 as well. So if your temp difference was greater than 40*... Time to create a load for warm weather.
HeathSexton
Handloader
- May 12, 2006
- 1,205
- 33
Mule Deer on the 24hourcampfire says in his tests 100V is very temp sensitive.
Creedmore
Beginner
- Oct 12, 2011
- 110
- 0
I'll be following this discussion. Shot some test groups with .25-06AI this morning to find a powder to start load development. H4831, H4350, H1000, Hybrid 100v, RL22. The best group of them all was Hybrid 100v, 1" group at 200yds and 85 degrees.
I was about to ask the temperature question when I stumbled upon this post. H100v isn't listed as one of Hodgdon's "Extreme" powders.
I was about to ask the temperature question when I stumbled upon this post. H100v isn't listed as one of Hodgdon's "Extreme" powders.
bteate":3uu0uljd said:
Hybrid 100V is a double base ball powder and as such is more temp sensitive than single base powders.
General Dynamics Weapons Division who now owns the old Remington/DuPont IMR series of powders and the old Winchester ball powder line has teamed up with the Australian ADI powders. The new IMR-4166, 4451 and 7977 are extreme powders and part of the teamwork between General Dynamics and ADI in Australia.
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- #8
Ok, my original post was pretty hastily written and I left out some details. ( trying to get off work) I didn't get any notifications on this so I thought it was a dead subject.
My original velocities at the time of work up averaged 2820 with sub 1/2 moa. Having thought I had found a good load, I loaded 20 for hunting season. I didn't take the rifle out last year. Last week a friend purchased a magnetospeed and I wanted to check it against my chrono. Wow! The first three averaged 2988 and without having my original notes with me I really didn't think it was that off. The next one went 3060, 240 fps over my original average. ( made a mistake in o.p.)
Without have the temperature recorded for original load, I would assume the difference was about 40*.
Thanks for everyone looking and sharing thoughts.
Sent from my iPhone using Tapatalk
My original velocities at the time of work up averaged 2820 with sub 1/2 moa. Having thought I had found a good load, I loaded 20 for hunting season. I didn't take the rifle out last year. Last week a friend purchased a magnetospeed and I wanted to check it against my chrono. Wow! The first three averaged 2988 and without having my original notes with me I really didn't think it was that off. The next one went 3060, 240 fps over my original average. ( made a mistake in o.p.)
Without have the temperature recorded for original load, I would assume the difference was about 40*.
Thanks for everyone looking and sharing thoughts.
Sent from my iPhone using Tapatalk
M7025-06
Beginner
- Jun 28, 2014
- 222
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bteate":2esfl1c8 said:
Did you have any obvious signs of pressure?
The reason I ask is I had similar results (but the other way around) when comparing velocities of a load in my 280 with my new Magnetospeed and my Shooting Chrony. The MS showed a muzzle velocity of 2860 fps compared to 2990 fps with the SC. Both loads were chrony'd at about the same outside temp.
I've been working on load for my 280 with H100v, I tend to shoot in the early mornings and I try not to do any load development when the temps are much over 70*-75*. So far, it's giving me pretty good accuracy & velocity. If I decide to use this powder this fall for Nov. deer season, I'll be interested to see how it performs in the cooler weather. We're finally getting into some fall weather here to where the morning lows will be in the mid 40's so I'm definitely going to keep an eye on my velocities to see how this powder reacts.
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- #10
