|11-04-2007, 04:54 AM||#1|
Join Date: Feb 2007
Location: South Carolina
Best Powder Burn Rate Comparison Chart I Have Yet To Find
You need to print this page and keep in your reloading manuals or post on the wall of your loading room.
|11-04-2007, 06:51 AM||#2|
Join Date: Jun 2004
Location: St. Louis, MO
Printing would be good; I could do without the music.
One thing that's always bugged me about burn-rate charts is that there are never firm numbers attached to them. Sure, it's nice to know that AA #5 is faster than Unique, but by how much? For all I know, two consecutive powders could be almost exactly the same, or they could be uncharacteristically different.
|11-04-2007, 08:54 AM||#3|
I looked over the chart and found some things I would question. It lists RL15 as slower than AA2700 which doesn't seem right. I know there are quite a few shooters who use RL15 in M1 and M14 patterns and I also know that AA2700 is too slow for the same rifles.
|11-05-2007, 09:09 PM||#4|
Join Date: Jul 2004
How do you know a powder is "too slow"?
IME, it seems to be not only variable by loading density, but also by general pressure range...maybe.
Before the manuals had much data on W-W WAP, I tried to work up a .357 Mag load with it using 125-gr bullets. It's a low-flash powder, good for 9mm and .40 S&W, and a few sources put those only 5,000 PSI/CUP/Piezo or whatever pressure units less than some other sources put the .357 Mag. Worth a try, right?
From my 4-inch, I got pressure signs and beginnings of sticky extraction at about the same velocities you'd expect from a 9mm load--well, maybe 50-75 fps faster since it was 125-gr and not the 115 like I usually loaded in 9mm.
Now Power Pistol, on the other hand, runs a lot faster for me in the .357 Mag, same bullets are 200+ faster and don't stick a bit. But they do flash pretty good...not as good as WW-296, but close.
The chart puts Power Pistol faster than WAP. Maybe so up to 33,000 PSI, but above that, WAP seems faster to me.
However, I don't "know" without pressure data. The sticky case pressure thing works only for Magnum pressures anyway but is even then a crude yardstick.
As far as the gas guns go, I won't take anyone's word of powder "xyz" being too slow for the M14-type unless they also give me some port pressure data. I've seen scarcely a peep on that, but I do "know" what the design parameters are, and I'm confident that any powder between IMR 3031 and IMR 4064 is OK--in .308 at least.
|11-06-2007, 12:24 AM||#5|
Join Date: Mar 2007
"I looked over the chart and found some things I would question. It lists RL15 as slower than AA2700 which doesn't seem right. I know there are quite a few shooters who use RL15 in M1 and M14 patterns and I also know that AA2700 is too slow for the same rifles."
I would have thought so too,,,however ; an Accurate Arms manual I have lists specific match data and lists '2700' for use w/ the M-1,,,further I have data published by NRA ,,, An article by one John Clark on loadind for the M-1 using IMR4350 with bullet weights of 180 & 190 grns. ,,,the author clearly states that port pressure would be excessive w/ lighter bullets.
NRA has also published data for M1-a match loads using IMR4320
More than one way to skin a cat I guess.
|11-06-2007, 07:32 AM||#6|
Join Date: Aug 2004
Location: "Close, but no donut!"
WW231 at #39 and HP-38 at #43? I was under the impression that these were exactly the same powder just sold under different names. And I have several sources where published loading data for the two is in fact identical.
|11-08-2007, 08:19 AM||#7|
Join Date: Jul 2004
Some other L-C/OTBC loads, however, had larger differences between the two powders, enough to make me pause and TEST before just substituting one powder for other on max loads.
|Search tags for this page|
gun powder burn rate chart,
gun powder burn rates,
gunpowder burn rates,
gunpowder comparison chart,
powder burn rate and pressure chart,
powder burn rate chart,
reloading powder burn rates,
reloading powder comparison chart,
smokeless powder burn rate chart
|Thread||Thread Starter||Forum||Replies||Last Post|
|How does RE-15's burn rate compare to IMR4895?||mcooper||Ammunition||6||10-05-2007 10:12 AM|
|Powder burn rates for M1 and M1-308||bsmd||M1 Garand||3||02-24-2005 01:56 PM|
|Instructional Chart for the M1 Garand||dj||M1 Garand||1||10-08-2004 07:52 PM|