Glad to see this updated.


https://www.hodgdon.com/wp-content/uploads/2019/11/burn-rate-color.pdf

Nice, thanks!

It looks like they missed IMR 4320.

Looks like it should be #108(a)

I think they are way off on R26 at well below R25. I have used R26 mostly in medium 08 and 06 sized cases so it may slow down in the larger cartridges. It seems to in the 270 WSM and 7RM but still seems faster than R25. These are only approximate I know but this is an ongoing issue with R26.

That Win StaBall sure sits in an interesting spot.

I bet it’ll be popular.

Guys, remember that this “data” was developed in ballistic testing chambers, not in firearms. That means that the relative quickness may be different in actual cartridges - in fact it often is. The observed relative quickness of any powder can change depending on the cartridge in which it is fired. This chart is just a guide and may show RQ differences compared to your experiences. Don’t assume that two powders adjacent to each other have the same burning rate in your firearm, they may be much different. This not loading data. Caveat emptor.


.

They also missed HP38 (same as Win231) but to make up for it they listed N130 twice #77,and #82. Probably closer to #77.

What they missed the boat on IMO is some of the Accurate Powder’s LT30,LT32 and 2015BR. They have LT30 as being the fastest burning rifle powder, faster than the 4198’s......not a chance. LT32 and 2015BR are also slower than listed. I agree with Tejano RL26 is listed slower than it really is.

Nice to have a new list that uses most of the newer powders though!!

Thanks for the link. I just searched for this a week or so ago to check on AR Comp and could not find a chart that included it.

Still omitting N565 and N570.

N130 is #82. #77 is supposed to be N120, they made a typo. Compare to the previous chart for reference; I happened to have it hanging on the wall and it lists N120 in that spot.

I need to get a can of Superformance and give it a try.

Tag

Misstated here, look at AA5744. According to them it’s a rifle powder. Also there hasn’t been any 2015BR since about 06-07.

Left off Norma URP &217 also

They made up for it by listing MRP2 which was discontinued a couple of years back.

Thanks Higbean, I was wondering when they were going to update the chart.

I agree that RL-26 seems faster than RL-25 in the loads I'm using.

Thanks to Higbean. But below says it all and I do believe that MD has stated such at times on here.

https://www.norma-ammunition.com/us/Ammunition-Academy/Reloading-Data/

When comparing different burning rate charts, one will notice variations in listed propellant ordering. Still, each such chart tells "the truth". Ranking differences result from use of different criteria. For example, a certain powder type can act slightly quicker than some other powder type, when used in 308 Winchester loads; however, when these powders are used in 7x64 loads, evident burning rates might reverse. Relative burning rate charts can never provide absolute data because too many factors are involved in how propellants burn within a cartridge chamber.

Misstated here, You want to go down that road IMR4227 and LIL'GUN are rifle powders too. My point was how far off this chart is on some of Accurate's powders.
LT-32 was developed with the help of Lou Murdica (hence the L in LT). It was to compete directly with N-133 in the 6ppc. for myself and all the others that I know that use it, it is just to the slow side of N-133. In fact I know several that blend a bit of LT30 with LT32 to speed it up a bit.
This chart shows LT32 at #74 in reality should be at least #85 LT30 is just as far off.
Accurate still makes 2015 in Canada, they dropped the BR suffix when they quit making it in Israel and the Czech Republic

also wrong

Yes Lou Murdica had a lot to do with LT32, but so did Don Nielsen.
Also they dropped the BR from the 2015 when they changed formulation and machines from the Czech Republic lots and if I remember correctly the BR got added when it went from Israel production to Czech. The 2015 Canadian is made on the exact same machine as LT30 and LT32.
In fact Canadian 2015 was used to blend and smooth out LT32 before LT30 even came out. The most satisfactory blend of 2015/LT32 turned out to be 60/40 32 to 2015. ES and SD dropped some while velocity stayed nearly the same. When LT30 came out the in thing was to blend 50/50 with 32 to come up with LT31.
I never had much luck with that exact blend, but did have good luck with a 40/60 blend of 32/ 30. Earlier this year I tried a 40/30/30 blend of LT32/30/2015 it looks promising but unfortunately after just one match I took a hiatus from competition and rifles, so I haven’t done any extensive testing yet. BR Central has a lot of threads on the development of these and the blending. Also it seems that the new T’s are lot to lot dependent as to how good they perform just as the 8208-T322 or T32 for short.

From early thread on BR Central

Speedy,

The LT-32 is an exact copy of the original T-32 manufactured in the same plant and on the same machinery as the original. Lou Murdica has been extensively testing it and he tells us it is the easiest powder to tune that he has seen in 40 years. According to Lou, the chamber that everybody was using in the 80's will work with this powder. The bullets do not need to be seated way out in order to get more powder in the case. In testing the powder in our Bond Universal receiver against the origin "T' powder, my S.D.'s were about 30% lower with the new powder versus the "T" powder. Lou and Don Nielson donated 16 pounds of the original T-32 lot of powder for our quality control and that is what the new powder is shot against. All of our powders are allowed to deviate +3% to -5% in pressure from the quality control lot except LT-32 which we cut the deviation percentages in half in order to have the best lot to lot consistency in the industry for this powder. Another advantage of LT-32 is the fact that our Accurate 2015 can be blended with this powder if anyone wants to adjust the burn rate. 2015 is also manufactured on the machinery, has the same geometry but is about 10% slower that LT-32.

Just a note on Hodgdon's 8208. The 8208 that is being brought into the country is not being brought in for the benchrest market as most people believe. It is being brought into the country for military contracts and it just so happened that it worked in the PPC. It is being QC'd for those military contracts not for benchrest shooters. There is more money in the military side of selling powder. I work directly with the company using it for military applications. LT-32 is just the opposite. We developed this powder specifically for the 6mm PPC and it is QC'd in the 6mm PPC.

I can send you a sample if you would like.


Best regards,
Keith Anderson
Western Powders Ballistic Lab

Trying RL23 in 280ai and see some differences that seem odd between shown burn rates of H4831sc and Rl 23.
With 4831 see pressure at 62-63 with 139LRX and with RL23 pressure shows up at 60 grains. Based on burn rate alone I would have thought the opposite would be true?

H414 is missing. It’s between Winchester 760 and Viht N150 on a chart I have.

Rl 12, not made in what 30yrs, but still on chart. They should have put Hi-Vel and Lightning on also.

Interesting reference thanks.

Based upon the comments am I to understand that the shape of the "bottle" you burn it in has a significant effect on the pressure developed?

This would make sense based upon what I have read about rifle case development.

Also to those who have seen many years of this table: is there much "drift" from year to year in specific powders?
(I have read about drift from batch to batch, as applies to consistency for precision shooting.)

Thanks