Burn rate charts

[thefitter]

Are there any burn rate charts that list a numerical designation of burn rate for each powder? All I ever see is a list but you can't really tell how close or far apart the powders really are in burn rate.

On Quick Load there is a "Burn rate factor". Would that be the number?

Thanks

 

[bigedp51]

If you use 748 in a 30-30 at 38,000 cup and 748 in a .308 at 50,000 cup the burn rates would not be the same but you are burning the same powder.

In Quickload the percent of powder burnt in a 20 inch barrel for the 30-30 would be 92.13% at 42,000 psi and the .308 would be 99.40 at 60,000 psi using 748.

The same thing would happen using Quickload for the .308 and starting at the suggested starting load and working up to max pressure.

Therefore the powder burn rate charts are approximate because chamber pressure can vary, and also the peak flame temperature varies.

 

[savagedasher]

Hodgdon has a burn rate chart you can pull up. Larry

 

[jonbearman]

What powder do you want to use and in what cartridge and gun combo?

 

[scpaul]

I just checked , the one on Loaddata.com has more powders, it's dated ----2012, doesn't show RL-33 so it's not complete either. I asked a tech @ one of the powder companies, he doesn't know of a complete one either. He said there isn't a overseeing assoc. like SAAMI. I was hoping for one where I might get the newest complete chart. Competetors don't seem to list each others newest powders. Anybody know of one better/more complete than the one on Loaddata.com??? Paul :-\

 

[Rtheurer]

Big Ed hit the nail on the head. If you have Quick Load you wont need a Burn Rate chart.. I hardly ever look at one anymore.

As much as I like Hodgdon Powders I think there Burn Rate chart is to simple like you pointed out above. I happend across The Wester Powders Burn Rate chart and it seemed to do a better job of listing Powders in Groups on a Spread sheet instead of a number 1-50. I think this is what your looking for.

RT

 

[Biggdawg]

here is the one i use from accurate, it groups the powders that are similar in burn rate it is missing a few like cfe http://www.accuratepowder.com/wp-content/uploads/2010/12/burn_rates.pdf

 

[dkhunt14]

I think you can only use the charts to get close to a burn rate you want to use. Variations in lots of powder can throw any position in a chart off. I have had powders with 50 or more feet per second difference from lot to lot. You still have to shoot the powder in your gun. matt

 

[scpaul]

Wat he sedd.

 

[thefitter]

I just checked , the one on Loaddata.com has more powders, it's dated ----2012, doesn't show RL-33 so it's not complete either. I asked a tech @ one of the powder companies, he doesn't know of a complete one either. He said there isn't a overseeing assoc. like SAAMI. I was hoping for one where I might get the newest complete chart. Competetors don't seem to list each others newest powders. Anybody know of one better/more complete than the one on Loaddata.com??? Paul :-\

Well if there is no universal standard then it's a crap shoot.

Thanks

 

[thefitter]

here is the one i use from accurate, it groups the powders that are similar in burn rate it is missing a few like cfe http://www.accuratepowder.com/wp-content/uploads/2010/12/burn_rates.pdf

That is a little better, thanks.

 

[Webster]

I don't think there is an exact number you can put on a powder for burn rates. Burn rates are determined under conditions that don't come close to what happens in a rifle. The burn rate varies depending on the conditions that confine it when it burns and how it is ignited.
% fill
charge wt.
chamber dimensions
freebore
barrel dimensions
bullet weight
primer
ect.

 

[Catfur]

I don't think there is an exact number you can put on a powder for burn rates. Burn rates are determined under conditions that don't come close to what happens in a rifle. The burn rate varies depending on the conditions that confine it when it burns and how it is ignited.
% fill
charge wt.
chamber dimensions
freebore
barrel dimensions
bullet weight
primer
ect.

Don't forget powder lot. The lot to lot variation on many powders is greater than the difference between them and the nearest powder.

 

[tipper999]

ADI Powders has a list, http://www.adi-powders.com.au/handloaders-guide/equivalents.asp

 

[scpaul]

This is a part of my problem, how manypowders/ powder mfgr.s have I not heard of ?? I use the powder burn rate charts to check powders that are close to each other, don't trust my memory. Then I research one that I have in my stock. I keep about 25-30, with that I have a pretty good coverage. I check the manual, if I don't have it, check the chart for one that I do, look for info. loading it. FOR THE NEWBIES: don't try to "customize the load" even if it is very close!Variables like case size, shape, volume, etc. can/do change pressures and pressure curves drastically. Years ago I accidentally loaded 2 pieces of military match brass with a full power IMR 4064 load. Luckily all I did was plow the primers. It was a good education, I imediately got more observant/careful. I still don't know where that brass came from, maybe a neighbor at the range?

 

[bigedp51]

Are there any burn rate charts that list a numerical designation of burn rate for each powder? All I ever see is a list but you can't really tell how close or far apart the powders really are in burn rate.

On Quick Load there is a "Burn rate factor". Would that be the number?

Thanks

If you have Quickload you will get more specific powder data because you select the caliber and chamber pressure and Quickload will give you a long list of powders.

http://www.accurateshooter.com/gear-reviews/test-quickload-review/

Powder burn rate charts are "ball park" and as stated above there are many variables. If you want a looooong list of powders look at Quickload for a given cartridge and bullet weight. If you want a short list look at your reloading manuals.

In Quickload you select "Propellent Table Setup" and then set your target chamber pressure, percent case fill, and you will get a looong list of powders.

Then there is Google and seeing what everyone else is using to get the best accuracy and burn rate charts will not tell you this.

Life was simpler in 1968 when I got my Lee loader and started reloading, the single powder scoop in the kit determined which powders you could use. All I had to worry about was what my dad said to me..............

"If you blow up the house I'm going to kick your A$$"

 

[SS427]

The VihtaVuori chart is the one I look at the most. It isn't numbered. Across the top it lists the different manufacturers and below that in columns it lists the different powders with fastest at the top. By looking across you can compare one powder to all the others in that burn range. I'm sure it isn't exact and doesn't take all the variables listed in this thread into account, but I consider it better than a numbered list.

You can download their reloading info off the VihtaVuori website and the burn rate chart is on the second page.

 

[Webster]

Why do you need burn rate charts or Quick Load to create a long list of possible powders? Can't you just look at what people are using in your caliber setting World Records. If someone shoots a 3.5" group at 1000 yards that shooter is my computer program.

 

[GrocMax]

Take a look at where Hodgdon and all the different mfgs put H335 and BLC2, 2 of the oldest, most produced military and civilian powders. Then wonder if you should trust 'burn rate'.

 

[Toscano]

Fitter,
Go to Vitavouri website...the use a graphic type of powder chartt...listing many powders and are able to visually determine who is close to whom. I had the same problem as yourself with those numbered lists. Western Powders uses the same kind of chart and I use both of them as comparisons. Western has some powders that Vitavouri doesn't, even RE17.