Post by: Hanshi on May 31, 2013, 04:01:44 PM
Goex
30grns -------------------------1371fps
40grns -------------------------1678fps
60grns -------------------------1848fps
JBP
30grns ------------------------1427fps
40grns ------------------------1701fps
60grns ------------------------1923fps
This is just for one rifle and needs to be tested with other calibers. It also falls upon me to repeat the Goex test using the .024" patch as was used with the JBP session.
Post by: sse on May 31, 2013, 04:41:30 PM
Post by: Fletcher on May 31, 2013, 06:16:37 PM
I would like to find a hotter powder for a lower price but I still want the consistency of GOEX
and the knowledge of safe pressures.
Post by: RiverCat on May 31, 2013, 08:04:27 PM
Post by: Uncle Russ on June 01, 2013, 01:52:19 AM
Quote from: "RiverCat"
I`ve got a feeling the higher velocity can be attributed more to the thicker patches you used with the JBP loads. To get accurate results would require using the same patches with both powder types. Thicker patches mean the ball will be a tighter fit in the bore generating higher presure and more velocity?
Personally, I think you're absolutely spot on.
At the same time I do appreciate Hansi sharing his results...sounds likes there may indeed be an alternative to the high cost of Goex, and Swiss.
FWIW; (which ain't a lot.)
Over the years I have test shot hundreds of loads through several different chronographs while testing / developing different lubes, and I can assure you, all else being equal, the tighter patch will generate a higher velocity every time.
Now, exactly how much more pressure, and just where that pressure peaked is another story as I have never had a way of testing any of this.
Having said that, I feel fairly confident that patch thickness alone should not be a cause for concern as I have seen, on more than just one or two occasions, folks using a mallet to start and seat a thick patched ball in hopes that they could increase pressures enough to flatten the trajectory from 100 to 200yds on the Silhouette Range.
Why is "where" the pressure peaks important?
Think of it like this:
A car can push a loaded dump truck a fairly long way, but only if he starts from a dead stop and bumper to bumper.
However, should he get a running-go at it.....I think you get the picture.
Same thing as short-starting a patch and ball, if the pressure is allowed to build and peak before the ball reaches the end of the barrel you can well be headed for a wreck....
As long as the pressure is allowed to build as the ball passes through the bore all is well, and along with more pressure you get a higher velocity, and a flatter trajectory.
When I was a young man there was an old saying amongst the old timers of the day that "you should load 'em till they "crack"".
Meaning the sound of a "crack" was much different than the typical sound of a "Booom". the crack indicating pressure had gone up...and that holds true today. A high pressure load will sound much different than a low pressure load.
Those who loaded their rifles to this point with the powder of that time were playing with fire...literally, but 200 & 300 yard "called" shots were not that uncommon.
Sorry for ramblin.......
Uncle Russ...
Post by: Stormrider51 on June 10, 2013, 12:13:57 AM
Storm
Post by: Hanshi on June 10, 2013, 02:58:49 PM
The charges I use (either powder) are well within the specifications of the barrel/caliber. If it shoots well then that's it. We are, after all not talking about smokeless. Other than JBP being 3F only, I can't really tell any difference between it and Goex by sight alone. I like them both and was simply delighted to see the same accuracy. If I need 2F or 4F it'll be Goex, of course. But 3F JBP is excellent and not a compromise at all.
Post by: Uncle Russ on June 10, 2013, 04:21:30 PM
I still haven't seen any JBP, but I am anxious to give it try once I do find some.
I haven't heard you say, at least that I can remember, but does JBP even make 2F?
Uncle Russ....
Post by: TallTexan on June 12, 2013, 10:14:21 PM
Quote from: "RussB"
I agree with you Hanshi...Jack's Battle powder comes only in 3f. Maybe Goex will supply them with non-graphite coated 2f in the future.
I still haven't seen any JBP, but I am anxious to give it try once I do find some.
I haven't heard you say, at least that I can remember, but does JBP even make 2F?
Uncle Russ....
Post by: Hanshi on June 13, 2013, 04:20:24 PM
Post by: Uncle Russ on June 13, 2013, 11:22:18 PM
Uncle Russ...
Post by: Mad Irish Jack on December 31, 2013, 06:29:51 PM
Quote from: "RussB"
...sounds likes there may indeed be an alternative to the high cost of Goex, and Swiss.
Uncle Russ...
Russ,
The best way I know of to beat the higher costs is volume purchasing. It's easy to do with friends or club. My reenacting group orders 25 or 50 pounds of Goex BP at a time. The price recently went up to $14.90 per pound which includes S&H and HazMat. We announce we're going to order. Those who want to order prepay for what they want to get. When we get to 25 or quick enough to order 50 pounds, we order it. When it comes in, the word's put out; guys pick it up or it's taken to an event and picked up. Last spring it was $11.90. But at $14.90 it still beats the pound cost at the gunshop. We use Powder Inc at Powder Inc. - Black Powder for shooters, and more (http://www.powderinc.com/) To order from them you need to fill out an application for what your use and need for your orders is. We have three guys that can order. Anyone can go to the site and check out the info.
FYI
Post by: Ranch 13 on January 01, 2014, 07:33:46 PM
Quote from: "Fletcher"
How did you know if the volume weights generate the same pressures?
I would like to find a hotter powder for a lower price but I still want the consistency of GOEX
and the knowledge of safe pressures.
Get ahold of some of Goex's Olde Eynsford powder, very clean, very fast, and has been extremely consistant, and at 16$ a lb for 25 lb case delivered to your door is reasonable enough in price.
Post by: Hanshi on January 02, 2014, 03:16:52 PM