AR15.Com Archives
 Is there a list of temp. sensitive powders?
lokifox  [Member]
11/2/2009 8:08:54 PM
That is all.
Paid Advertisement
--
Shizzlemah  [Member]
11/2/2009 8:21:43 PM
Allow me to start.

1) Win 748
2) Win 748
3) Win 748
Falar  [Team Member]
11/2/2009 9:33:58 PM
Originally Posted By Shizzlemah:
Allow me to start.

1) Win 748
2) Win 748
3) Win 748


BLC-2 and H335 and their alternate egos WC 844 and WC 846.

Now I haven't loaded with RL15, RL22, or RL25 but people that have down here in the hot Texas summer tell me that those 3 powders are pretty damn temperature sensitive too.
steve4102  [Member]
11/2/2009 9:36:26 PM
Yup, It looks like this.
. Norma R-1
2. Vihta Vuori N310
3. Hodgdon Titewad
4. Accurate Nitro 100
5. Alliant Bullseye
6. Accurate Solo 1000
7. Scot Red Diamond
8. Alliant Red Dot
9. Alliant Promo
10. Hodgdon Titegroup
11. Accurate No. 2
12. Alliant American Select
13. Winchester AA Plus
14. Hodgdon Clays
15. Vihta Vuori N320
16. Ramshot Competition
17. Scot Royal D
18. Winchester WST
19. Hodgdon HP38
20. Winchester 452AA
21. Scot 453
22. Winchester 231
23. Ramshot Zip
24. IMR 700X
25. Alliant Green Dot
26. Hodgdon Int. Clays
27. Vihta Vuori N330
28. IMR PB
29. Accurate No. 5
30. Scot Pearl
31. Winchester 473AA
32. Hodgdon HS-5
33. Winchester WSL
34. Alliant Unique
35. Hodgdon Univ. Clays
36. Alliant Power Pistol
37. IMR SR-7625
38. Hodgdon HS-6
39. Ramshot Silhouette
40. Winchester WAP
41. Vihta Vuori N340
42. Winchester 540
43. Alliant Herco
44. Winchester WSF
45. IMR SR-4756
46. Scot Solo 1250
47. Vihta Vuori 3N37
48. IMR 800X
49. Accurate No. 7
50. Hodgdon Longshot
51. Scot Solo 1500
52. Ramshot True Blue
53. Vihta Vuori N350
54. Vihta Vuori 3N38
55. Hodgdon HS-7
56. Alliant Blue Dot
57. Winchester 571
58. Vihta Vuori N105
59. Accurate No. 9
60. Ramshot Enforcer
61. Scot 4100
62. Alliant Steel
63. Alliant 2400
64. Vihta Vuori N110
65. Hodgdon Lil Gun
66. Norma R123
67. Hodgdon H110
68. Winchester 296
69. IMR SR-4759
70. Vihta Vuori N120
71. IMR 4227
72. Accurate XMR 5744
73. Alliant 410
75. Vihta Vuori N130
76. Winchester 680
77. Norma N200
78. Accurate 1680
79. Vihta Vuori N133
80. Hodgdon H4198
81. IMR 4198
82. Scot Brig 4197
83. Accurate XMR 2015
84. Scot Brig 3032
85. Alliant RL7
86. IMR 3031
87. Hodgdon Benchmark
88. Norma N201
89. Scot Brig 322
90. Hodgdon H322
91. Ramshot X-Terminator
92. Accurate 2230
93. Winchester 748
94. Alliant RL10X
95. Hodgdon BLC-2
96. Accurate 2460
97. Hodgdon H335
98. Ramshot TAC
99. Hodgdon H4895
100. Accurate XMR 2495
101. Alliant RL12
102. IMR 4895
103. Scot Brig 4065
104. Vihta Vuori N135
105. Hodgdon Varget
106. IMR 4064
107. Accurate XMR 4064
108. Accurate 2520
109. IMR 4320
110. Norma N203
111. Vihta Vuori N140
112. Vihta Vuori N540
113. Accurate 2700
114. Ramshot Big Game
115. Alliant RL15
116. Hodgdon H380
117. Winchester 760
118. Scot Brig 4351
119. Hodgdon H414
120. Vihta Vuori N150
121. Vihta Vuori N550
122. Accurate XMR 4350
123. IMR 4350
124. Hodgdon H4350
125. Norma N204
126. Ramshot Hunter
127. Alliant RL19
128. Vihta Vuori N160
129. Vihta Vuori N560
130. IMR 4831
131. Scot Brig 4831
132. Norma N205
133. Accurate XMR 3100
134. Winchester WMR
135. Hodgdon H4831
136. Norma MRP
137. Alliant RL22
138. Winchester 785
139. Hodgdon H450
140. Accurate Mag Pro
141. Vihta Vuori N165
142. Winchester WXR
143. IMR 7828
144. Accurate 8700
145. Hodgdon H1000
146. Ramshot Magnum
147. Alliant RL25
148. Hodgdon Retumbo
149. Hodgdon H870
150. Vihta Vuori N170
151. Vihta Vuori 24N41
152. Hogdon 50 BMG
153. Vihta Vuori 20N29
Ch0wd3r  [Member]
11/2/2009 10:41:01 PM
radio2  [Team Member]
11/2/2009 11:11:42 PM
H4350 is not temp senitive as it is in there extreme line of powders
http://www.hodgdon.com/extreme.html
Falar  [Team Member]
11/2/2009 11:36:03 PM
Originally Posted By radio2:
H4350 is not temp senitive as it is in there extreme line of powders
http://www.hodgdon.com/extreme.html


All of the Hodgdon Extreme powders are in his post, as is just about every other powder I can think of. I think he is making a sarcastic point, that ALL powders are temperature sensitive, just some are more (sometimes MUCH more) sensitive than other.s
EWP  [Member]
11/3/2009 12:18:50 AM
I think he might have got temp confused with burn rate, I didn't look that close but H335, H322, H4895, Benchmark, & Varget were close to were they usually are on a burn rate chart but I dont know so many of the others I couldn't say one way or another.
NVGdude  [Member]
11/3/2009 12:36:38 AM
Originally Posted By Falar:
I think he is making a sarcastic point, that ALL powders are temperature sensitive, just some are more (sometimes MUCH more) sensitive than other.s


This. Simple physical chemistry. All chemical reactions occur faster at elevated temperatures. Thus all powders will see a relative increase in burn rate as temps increase.
Different powders may be more of less susceptible.
FriscoPete  [Member]
11/3/2009 12:37:14 AM
Actually, the powders that are listed by the manufacturer as temperature insensitive should really be thought of as insensitive to cold weather moreso than hot weather. Velocity is retained at or below freezing temperatures where a standard powder would lose velocity. For example IMR 4350 often will lose 100 fps in velocity at zero degrees when shot from a .30-06 - as compared to the same powder/charge shot at 70 degrees, while an "Extreme" powder like Hodgdon's H-4350sc will deliver the same velocity at zero as at 70 degrees.

When temperatures go to the other extreme - say 100 degrees, even the "temperature insensitive" powders really aren't. So pressures and velocity will rise at 100 degrees over that registered at 70.

So while there is a definite and real benefit to temperature insensitive powders like Hodgdon's Extreme line, and others like Alliant Reloader 15, Ramshot TAC and others, they probably should be considered more "temperature resistant" than truly temperature insensitive - with the insensitive part being on the lower-than-room-temperature side of the spectrum.

If you go to the powder manufacturer's website and powder description area - the powder will be touted as such (temperature insensitive). If the manufacturer is mute about this attribute, assume it isn't.
lokifox  [Member]
11/3/2009 12:40:38 AM
I would imagine all powders change slightly with fluctuations in temperature. I was wondering about which ones could have dangerous consequences.
steve4102  [Member]
11/3/2009 7:06:20 AM
Originally Posted By Falar:
Originally Posted By radio2:
H4350 is not temp senitive as it is in there extreme line of powders
http://www.hodgdon.com/extreme.html


All of the Hodgdon Extreme powders are in his post, as is just about every other powder I can think of. I think he is making a sarcastic point, that ALL powders are temperature sensitive, just some are more (sometimes MUCH more) sensitive than other.s


Correct!

lawrence3  [Member]
11/3/2009 7:06:42 AM
" Simple physical chemistry. All chemical reactions occur faster at elevated temperatures. Thus all powders will see a relative increase in burn rate as temps increase.
Different powders may be more of less susceptible."

Correct. IIRC, the exact temp dependence is a function of the activation energy.

Larry

Eagle-ReaperDriver  [Team Member]
11/4/2009 2:00:47 AM

Originally Posted By steve4102:
Yup, It looks like this.
. Norma R-1
2. Vihta Vuori N310
3. Hodgdon Titewad
4. Accurate Nitro 100
5. Alliant Bullseye
6. Accurate Solo 1000
7. Scot Red Diamond
8. Alliant Red Dot
9. Alliant Promo
10. Hodgdon Titegroup
11. Accurate No. 2
12. Alliant American Select
13. Winchester AA Plus
14. Hodgdon Clays
15. Vihta Vuori N320
16. Ramshot Competition
17. Scot Royal D
18. Winchester WST
19. Hodgdon HP38
20. Winchester 452AA
21. Scot 453
22. Winchester 231
23. Ramshot Zip
24. IMR 700X
25. Alliant Green Dot
26. Hodgdon Int. Clays
27. Vihta Vuori N330
28. IMR PB
29. Accurate No. 5
30. Scot Pearl
31. Winchester 473AA
32. Hodgdon HS-5
33. Winchester WSL
34. Alliant Unique
35. Hodgdon Univ. Clays
36. Alliant Power Pistol
37. IMR SR-7625
38. Hodgdon HS-6
39. Ramshot Silhouette
40. Winchester WAP
41. Vihta Vuori N340
42. Winchester 540
43. Alliant Herco
44. Winchester WSF
45. IMR SR-4756
46. Scot Solo 1250
47. Vihta Vuori 3N37
48. IMR 800X
49. Accurate No. 7
50. Hodgdon Longshot
51. Scot Solo 1500
52. Ramshot True Blue
53. Vihta Vuori N350
54. Vihta Vuori 3N38
55. Hodgdon HS-7
56. Alliant Blue Dot
57. Winchester 571
58. Vihta Vuori N105
59. Accurate No. 9
60. Ramshot Enforcer
61. Scot 4100
62. Alliant Steel
63. Alliant 2400
64. Vihta Vuori N110
65. Hodgdon Lil Gun
66. Norma R123
67. Hodgdon H110
68. Winchester 296
69. IMR SR-4759
70. Vihta Vuori N120
71. IMR 4227
72. Accurate XMR 5744
73. Alliant 410
75. Vihta Vuori N130
76. Winchester 680
77. Norma N200
78. Accurate 1680
79. Vihta Vuori N133
80. Hodgdon H4198
81. IMR 4198
82. Scot Brig 4197
83. Accurate XMR 2015
84. Scot Brig 3032
85. Alliant RL7
86. IMR 3031
87. Hodgdon Benchmark
88. Norma N201
89. Scot Brig 322
90. Hodgdon H322
91. Ramshot X-Terminator
92. Accurate 2230
93. Winchester 748
94. Alliant RL10X
95. Hodgdon BLC-2
96. Accurate 2460
97. Hodgdon H335
98. Ramshot TAC
99. Hodgdon H4895
100. Accurate XMR 2495
101. Alliant RL12
102. IMR 4895
103. Scot Brig 4065
104. Vihta Vuori N135
105. Hodgdon Varget
106. IMR 4064
107. Accurate XMR 4064
108. Accurate 2520
109. IMR 4320
110. Norma N203
111. Vihta Vuori N140
112. Vihta Vuori N540
113. Accurate 2700
114. Ramshot Big Game
115. Alliant RL15
116. Hodgdon H380
117. Winchester 760
118. Scot Brig 4351
119. Hodgdon H414
120. Vihta Vuori N150
121. Vihta Vuori N550
122. Accurate XMR 4350
123. IMR 4350
124. Hodgdon H4350
125. Norma N204
126. Ramshot Hunter
127. Alliant RL19
128. Vihta Vuori N160
129. Vihta Vuori N560
130. IMR 4831
131. Scot Brig 4831
132. Norma N205
133. Accurate XMR 3100
134. Winchester WMR
135. Hodgdon H4831
136. Norma MRP
137. Alliant RL22
138. Winchester 785
139. Hodgdon H450
140. Accurate Mag Pro
141. Vihta Vuori N165
142. Winchester WXR
143. IMR 7828
144. Accurate 8700
145. Hodgdon H1000
146. Ramshot Magnum
147. Alliant RL25
148. Hodgdon Retumbo
149. Hodgdon H870
150. Vihta Vuori N170
151. Vihta Vuori 24N41
152. Hogdon 50 BMG
153. Vihta Vuori 20N29
Is that in order of least sensitive (1) to most sensitive (153) or the other way around?

steve4102  [Member]
11/4/2009 6:48:42 AM
In order from faster to slowest burn rate.
30Caliber  [Team Member]
11/4/2009 11:54:01 AM

Originally Posted By Eagle-ReaperDriver:

Is that in order of least sensitive (1) to most sensitive (153) or the other way around?


It's just a list of powders. It doesn't have what you're looking for.


Ball powders, as a rule of thumb, will be pretty senstive to temp.
AKFF  [Team Member]
11/9/2009 3:47:29 AM
I need to tag onto this thread as this is something that I have some real questions about. I am in my 3rd month of reloading, and the temp is dropping fast here in Alaska. I am currently working up some loads for my 7mm rem mag and am wondering how worried I need to be about temp changes.

If I do load workups at 15 degrees or less, will those loads blow up my gun if used at 70 degrees? Should I be using only temp insensitive powders?


Powders I use:
RL22
Win 296
True Blue
H 4895
leid  [Team Member]
11/9/2009 8:34:28 AM
Several years back Hodgdons did a velocity spread test from 0-125 F on 7.62x51mm using a 168gr OTM bullet. Their data showed the most temperature sensitive powder in their test to be IMR 4895, not a ball powder. Hodgdons data was on their website but has since been removed. I have had no luck in getting Hodgdons to send me their full list of data from their tests. A partial list of the Hodgdons data is below:

Velocity spread in FPS between 0-125 degrees F:

1. H4350: 4 (FPS)
2. Varget: 8
3. H4831C: 10
4. RL 12: 26
5. AA4350: 29
6. AA2460: 36
7. IMR 4064: 46
8. VIT 550: 49
9. RL 15: 50
10. VIT N140: 50
11. AA2520: 63
12. IMR 4350: 67
13. RL22: 75
14. RL 19: 94
15. AA3100: 113
16. W 748: 114
17. VIT N560: 121
18. IMR 4831: 127
19. IMR 4895: 166

Keith Anderson's email on temperature stability of Ramshot TAC powder cut & pasted here with his written permission:



powder temperature stability Friday, June 13, 2008 12:36 PMFrom: "Keith Anderson"

Carey,

First I would like to thank you for your interest in Ramshot powders.

All of the powders sold under the Ramshot or Accurate brands meet or exceed the military specification for hot and cold stability. As with anything some powders are better than others. Single base powders such as Varget can be made more temperature stable than double based powders such as Accurate 2520 although there are trade offs to anything. While the nitroglycerin in a double based powder makes it less temperature stable it is the component that makes double based powders cleaner burning and allows them to attain higher velocities than their single based cousins.

In both the single base and double base lines of powders some powders have better temperature stability than others. Ramshot "TAC" is one of the most temperature stable double based powders available. It is this very reason that so much of it is being used for military applications in both Iraq and Afghanistan. Even under extreme temperatures Ramshot "TAC" will vary less than half of what the military will allow.

I hope this helps you out.

Good shooting!

Keith Anderson
Western Powders Ballistic Lab
Paid Advertisement
--