Powder Issues?

[shoot4fun]

Burn Rate Charts are NOT to be used to do anything but get a "relative" grouping of what powders MAY be similar to others in BURN RATE only. The BRC does nothing to indicate which powders in which "groups" will generate more/less pressure than others. Maybe I am not explaining myself well but, for example, there are many powders in the H4350 burn rate zone. A couple may exhibit exactly the same traits of burn rate and pressure as H4350 but others will generate much different pressures. I am sure @Alliant Reloading can explain what I am saying much better than I did.
Liability Statement:
I am not a scientist. I am not employed by any powder manufacturer. I did not stay at a Holiday Inn last night but I did sleep on a new mattress.

 

[ShootDots]

Benjamin, our guys should be advising that Reloder 23 is similar burn speed to Reloder 22. As JohnKielly points out, we see quite a bit of difference in performance depending on the system it is being used in. All powders to some extent, and these new Bofors TZ Reloders in particular, will appear faster burning (higher P/V ratio) in one cartridge, and slower burning (lower P/V ratio) in another system. So while I say Reloder 23 is similar to Reloder 22, it is definitely different, so check the specific reloading recommendations and work up toward the max charges carefully.

Mikemci, Reloder 17 was designed without decoppering agents, and we like it just the way it is.

Shoot well (safely),
Paul

Thank You Paul! As it turns out, today I started load development in a .260A.I. that needs some work. In the .260A.I. it is definitely acting quite a bit slower than H4831SC. Evidently, depending on which cartridge it is being used in, it will act quite a bit differently from one cartridge to the next. I believe I am getting a better grasp of the powders' characteristics! Thanks Again..

 

[243winxb]

Decoppering Agent.
↑
Are there any definitive, scientific, statistically valid tests showing that these copper fouling powders actually do anything?
Yes. Military testing . Lead foil was first used, then tin, the new one has bismuth, compounds.

http://www.vihtavuori.com/en/news/22

All Vihtavuori reloading powders produced today have an added decoppering agent, also called anti-fouling agent.

16.03.2017

My question is, do our cleaning solvents remove these new decoppering agents??
https://m.facebook.com/vihtavuoripowders/posts/1152168241560898:0

 

[fingers]

I have just started testing my .243 with RL 23 & was very surprised by the speed it is generating. I use turned nk Lapua case,
Rem 9 1/2 primer, 87 gr Berger VLD hunting. Started out at 46 gr & worked up slowly to 47 grs. 47 gr took me to av 3303 with
SD of 8 for 3, 5 shot groups. This seemed way to fast & although it shot great in the 2s & 3s. I tried to call Alliant but could not get to a tec. They said they will call back & I believe they will. I then called Berger and they stated that with the 87 VLD bullet the max load was 47 1/2grs of RL23. at 3197 fps, thru a 24 inch barrel. I have a 23 inch barrel and it has always shot a bit fast but I was hitting 3186 FPS at 46 grs. This might be a good place to say even at 47 grs I had a normal bolt lift, no primer cratering, no sign of high pressure of any kind. I measured the fired brass cross the firing pin strike and it measured exactly the same as the case after primer was removed. I will work this on up to 47 1/2 grs just to see what it does but can not believe it needs any more speed. I also shot all loads at .010 jump, & will play with seating depth just to see were it goes. If RL 23 becomes more available, this will certainly be added to the list of bullet, powder combinations I use in my other .243s.

 

[ebb]

Paul, thank you for the information it is good that we get this kind of technical stuff from the source and get the truth not myths and legends.

 

[searcher]

Thanks so much to Alliant Reloading for the comments on the Reloader 15! I too, was a bit disappointed about the fouling, even though my loads run on the warmer side. I was unaware of the additives and I'll no longer concern myself so much with the residue effect on my bore. Good stuff!

 

[Dgd6mm]

Burn Rate Charts are NOT to be used to do anything but get a "relative" grouping of what powders MAY be similar to others in BURN RATE only. The BRC does nothing to indicate which powders in which "groups" will generate more/less pressure than others. Maybe I am not explaining myself well but, for example, there are many powders in the H4350 burn rate zone. A couple may exhibit exactly the same traits of burn rate and pressure as H4350 but others will generate much different pressures. I am sure @Alliant Reloading can explain what I am saying much better than I did.
Liability Statement:
I am not a scientist. I am not employed by any powder manufacturer. I did not stay at a Holiday Inn last night but I did sleep on a new mattress.

What brand of mattress? Thanks to Paul for the information.

 

[243winxb]

Email Reply from ADI.

These ADI/Hodgdon powder do NOT have a decoppering agent.

H4227 is a ADI powder also.