Compressed Loads...Bad Juju?

to indicate that compressed powders are OK is not right for ALL powders. as was indicated when ya break kernels you expose more. I also shoot palma and in 308 ,also use Russian powder manufactured for the 308, if you crush THIS powder you WILL have heavy bolt lift and did I say to NOT leave it in the sun for any period or it will be a 9 out the top.

Clarence
 
If every kernel of extruded powder were smashed or at least broken in
half, there would be much more surface area for that weight of powder.
It would in every likelyhood create more pressure. Powder breaks when
caught in a measure, but its not a fragile as one would believe. Its
not unlike hay that is baled (compressed). That a column of powder
in a case, more specifically in the neck is pushed downward 1/8 inch
is a long way from pounding it in with a hammer.
 
One of the banes of intelligent discussion is making statements as if they were fact that are just a WAG. Next time, you might just ask, is this what you think happens, to which the reply would have been no, or simply what have your experiences with compressed loads been? Stick to what you know for sure, what you can prove, when making flat statements, lest your credibility suffer greatly.
 
Pulled a few lines from this link.

http://www.fbi.gov/hq/lab/fsc/backissu/april2002/mccord.htm#table1 Personally i dont have a clue. :confused:
another important characteristic is its morphology. Shape and size have a profound effect on the burning rate and power generation of a
powder (Meyer 1987).
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and the resulting mixture is shaped by extrusion and cut into specified lengths. The granules are screened to ensure consistency,
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I would guess you don't want any of this lot.
In the manufacturing process, smokeless powders are recycled and reworked (National Research Council 1998). When a powder within a batch is found to be unsatisfactory, it is removed and returned to the process for use in another lot. Manufacturers save money by recycling returns by distributors or the return of surplus or obsolete military powders. Hence, reworking and recycling the material assures good quality control of the final product, reduces costs by reusing materials, and reduces pollution by avoiding destruction by burning.
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I see it this way, a little compression is OK., but can be over done as in anything.:confused:
 
Revolvers are fairly easy to make come undone if the wrong (too fast) powder is used or a double charge of most handgun powders is used. Slow handgun powders can usually be compressed some without problems as long as the charge isn't too heavy to start with. I've used charges of N110 in a .357 Magnum that were compressed to some degree with no trouble.

Back maybe 50 years ago or so American Rifleman had an article about Bullseye blowing up target revolvers. Some testing was done to disprove the theory that Bullseye had been changed and gotten faster since the people who had blown up their guns SWORE on a stack of Bibles that they had NOT double charge any cases. Seating a flush seated wadcutter 1/16" deeper in a .38 Spl case can increase pressures dramatically. Deeper seating raised the pressures WAY beyond what the cylinders could cheerfully endure. The various loads were all pressure tested by H P White labs.
 
German Salazar said:
Clarence, nice to see you're alive! I hope you make it down the mountain a time or two this season

Chad, I got tired of fooling with Varget; trying to stuff a .30-06 load into a .308 case is just too aggravating. I switched to H4895 and have been happy with that but now am also using something else.

http://riflemansjournal.blogspot.com/2009/10/reloading-imr-4320.html

Worth a try if you have some.
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Well buddy I gotz 16lbs of the stuff to get through (Varget). I've got a bunch of N150/N540 and I've also got a pile of 4895 (old IMR) so I guess it'll give me plenty to experiment with over the winter.

I've had this rifle for 5 years now and I've got less than a 100 rounds through it. Time to get serious again while my eyes still work half decent.

Cheers,

C
 
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