[Tom E]

Anyone tried the same load "from the cooler" vs "from the dashboard" to see if Solo 1000 gets faster or slower if the ammo is warmer? Last I tried this with was 452AA which was definitely faster "out of the cooler" vs 100 deg from sitting "on the dashboard".

[justforfun]

I've just started loading Solo 1000 and would also like to know how it reacts to temp changes. Hopefully someone has an answer.

[Tom E]

justforfun, on Aug 11 2009, 09:03 PM, said:

I've just started loading Solo 1000 and would also like to know how it reacts to temp changes. Hopefully someone has an answer.

If nobody knows, I'll do the comparison and post results. Easier to ask if someone has already done this.

This post has been edited by Tom E: 11 August 2009 - 08:30 PM

[almostold]

I might be able to try this on Friday - sposed to be warm day. I just started using Solo1000 so will be interested to find out.

[SA Friday]

I've read a couple of posters having temp sensitivity from their loads. I've been using it off and on for a couple of years now and haven't seen any temp issues. There's a small following around here using it, and they haven't had issues either.

test it, would love to see what you find out.

[ben b.]

SA Friday, on Aug 11 2009, 07:52 PM, said:

I've read a couple of posters having temp sensitivity from their loads. I've been using it off and on for a couple of years now and haven't seen any temp issues. There's a small following around here using it, and they haven't had issues either.

In my tests I'm not seeing any chrono difference with S1000 between ambient 90s and ambient low 40s.

[granderojo]

I'd call that pretty stable. Tom, if you do your own test, please post the results for comparison. It would be great if they turned out the same.

My 2ctsw.

[atbarr]

granderojo, on Aug 12 2009, 11:01 AM, said:

I'd call that pretty stable. Tom, if you do your own test, please post the results for comparison. It would be great if they turned out the same.

My 2ctsw.

You can get the ¢ sign by holding down the Alt key and then 0162. This will not work with numbers keys on top. On the #'s to the right (Key pad?)

My 2 ¢,

A.T.

[kmitchl]

I'd be interested in seeing similar data collected on a number of different powders. I was recently burned by AA2 at a match when I left my ammo in the sun for 20 minutes before I shot a stage. It was loaded to around 135 pf at 85-90 degrees. After being in the sun it was so slow it would not cycle the slide. It would be helpful to know if a particular powder gets faster or slower with heat and cold.

I've loaded some S1000 and been impressed with the results. I'm thinking it may be the less expensive and more available alternative to N320.

[Dan Burwell]

I have seen a big difference with temps using Solo1000 in 9 minor. Maybe it is because I have shot in a wide range. My match ammo is always the same load I do not change it and always check several charges before I load and periodically while I am loading. I have had is chrono as high as 148 at an out door match in the middle of January in NE PA (I don't remember the temp off the top of my head but is was freakin cold). and as low as 130 when I left them sit on the dash with the box open on a sunny 85deg day. They were so hot I could barley load them into the mags, but knowing it is reverse temp sensitive I wanted to see how low they could go on a worse case scenerio.

edited to add: I still love the powder so this will not stop me from using it, it is just a matter of knowing how the powder works and factoring it into the final load.

This post has been edited by Dan Burwell: 12 August 2009 - 10:08 AM

[SA Friday]

Dan Burwell, on Aug 12 2009, 11:04 AM, said:

I have seen a big difference with temps using Solo1000 in 9 minor. Maybe it is because I have shot in a wide range. My match ammo is always the same load I do not change it and always check several charges before I load and periodically while I am loading. I have had is chrono as high as 148 at an out door match in the middle of January in NE PA (I don't remember the temp off the top of my head but is was freakin cold). and as low as 130 when I left them sit on the dash with the box open on a sunny 85deg day. They were so hot I could barley load them into the mags, but knowing it is reverse temp sensitive I wanted to see how low they could go on a worse case scenerio.

edited to add: I still love the powder so this will not stop me from using it, it is just a matter of knowing how the powder works and factoring it into the final load.

That sounds like a huge temp swing Dan. What do you suspect the top and bottom temps were, 140 and 20 degrees?

I haven't tested the extremes. 30 to 90 is about all I've looked at and didn't see anything as extreme as a 18pf swing. Hell, at normal temps I didn't see anything over 4pf.

[Dan Burwell]

SA Friday, on Aug 12 2009, 01:26 PM, said:

That sounds like a huge temp swing Dan. What do you suspect the top and bottom temps were, 140 and 20 degrees?

I haven't tested the extremes. 30 to 90 is about all I've looked at and didn't see anything as extreme as a 18pf swing. Hell, at normal temps I didn't see anything over 4pf.

That is probably about right the January match was colder than hell, I had mittens with hand warmer stuffed inside and my hands were still cold, it was also snowing like you wouldn't believe(fun match )

While I didn't do the cold thing as a test it was a major IDPA match that happened to have a chrono, the heating the buggers up was on purpose since I am shooting Nationals in Vegas, I just wanted to see what would happen if they were to have left my chrono ammo in the sun before testing it. Since we don't get to control how they handle our chrono ammo, I just wanted to make certain no matter what they did I would be good to go.

In normal temp ranges I would agree with you it varies about 4-5pf

[ben b.]

ben b., on Aug 11 2009, 08:46 PM, said:

SA Friday, on Aug 11 2009, 07:52 PM, said:

I've read a couple of posters having temp sensitivity from their loads. I've been using it off and on for a couple of years now and haven't seen any temp issues. There's a small following around here using it, and they haven't had issues either.

In my tests I'm not seeing any chrono difference with S1000 between ambient 90s and ambient low 40s.

I should point out for my chrono results that I did not leave them in the dash to get above 100, or cool/freeze them before shooting. I simply had them out and about in normal fashion (box of shells on top of the range table) and chronographed 10 or more shots after a suitable time, and the results showed no difference.

These are the cleanest examples I can find in my data, in that they are direct comparisons. I have more that show the same general trend but aren't as clean, like .1 gr different charge, different lot of powder, different times of year but no temp recorded, etc. I'm pretty sure I know my which entry is my 90* data point, but I didn't record the temp, so I can't really use that as support. I've concluded that general practice in my area shows no appreciable difference.

147 gr 9mm FMJ Hornady, 3.8 gr S1000, OAL 1.155"

Ambient temp 65*F 18, shots:
Avg 892 (sd=16), PF 131

Ambient temp 35*-40*F, 10 shots:
Avg 894 (16), PF 131

180 gr Lead .40, 3.4 gr S1000, OAL 1.125"

Ambient temp ~40*F, 22 shots:
Avg 761 (7), PF 137

Ambient temp ~78*F, 20 shots:
avg 768 (11), PF 138

This post has been edited by ben b.: 12 August 2009 - 10:52 PM

[Tom E]

Well I tried cold vs hot, same batch of ammo shot back to back. Ambient temp (~80 deg F) vs out of the freezer and carried in a cooler.

5" S&W 625, 200 gr Precision RN, 1.200"oal, Fed 150, 5.2 gr Solo 1000. Cold 862 fps avg, Hot 853 fps avg. 16 rounds of each.