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  #1  
Old 11-16-2016, 02:14 AM
johno johno is offline
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Default How Compressed Is To Compressed?

Not small cal but 7.62x39, I am loading lapua cases, 123 gr Barnes TSX & Hornady 123 gr SST.

Powder is ADI 2219 (H 322) yes they are the same powder
31.5 gr = Just over 2,500 fps only worry is the powder comes to near the top of the case I can feel resistance when bullet seating.

Load shows no presure sign and a friend who ran it in quickload came up with
55,000 PSI in the CZ 527 which it should handle without problems.

So gentleman is this compression ok?

Thanks
Johno
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  #2  
Old 11-16-2016, 04:09 AM
georgeld georgeld is offline
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IF you're afraid of it, lay it on an old tire and pull the
trigger with a long string!!
Just don't try it with 2400 John!!

I tried filling a .40&W case with Red Dot and it bulged the case.
Oh well, pulled it and gave up.
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Old 11-16-2016, 04:53 AM
RareBear RareBear is offline
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H322 is a small extruded powder and the following probably does not apply.

Back in the day, Winchester had some trouble with compressed loads of ball powder in 458 ammunition. Fresh ammo worked, the problem seemed to be a function of time, longer shelf time=more problems.

"Winchester loaded the cartridges with a ball powder that required compression to fit enough in the .458 short case to provide required performance. In time, however, the compressed power charge "caked," causing erratic burn and poor performance levels. By the 1970s, Winchester rectified this issue by manufacturing the cartridge with non-clumping propellant.[12]"

This was bad news in a dangerous game rifle.

https://en.wikipedia.org/wiki/.458_W...te_note-cotw-3
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Last edited by RareBear; 11-16-2016 at 05:03 AM.
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  #4  
Old 11-16-2016, 03:13 PM
SmokinJoe SmokinJoe is offline
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I wouldn't worry about it too much unless you are getting rings on the bullets or they get pushed back out a few days after loading. IMO, either symptom would indicate too much compression.
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  #5  
Old 11-16-2016, 05:02 PM
Daryl Daryl is offline
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The general rules is to not compress ball or spherical powders- much. Even though that is supposed to be the RULE, I used heavily compressed loads of H335 in my .458 2" and got really good ballistics with that method. My ammo never lasted more than 6 months, so perhaps that was a 'factor' in it's good performance.

I would say if the powder pushed the bullet out of the crimp, it was too heavily compressed.

Once you start compressing the powder, keep a close watch over pressure signs.
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Old 11-16-2016, 09:23 PM
johno johno is offline
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Thanks for the advice fellas, I pulled back 1/2 gr to 31.0 gr, of course its still a compressed load, no case distortion, ni indent on the bullet, BANG, no presure signs so should be good to go.

I do like like this round in that 527 action a fun little outfit

Johno
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  #7  
Old 11-17-2016, 03:55 AM
GrocMax GrocMax is offline
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Seater ring marked bullets and inconsistent seating depth= too much.

What about 2207/H4198? Too bulky?

Last edited by GrocMax; 11-17-2016 at 04:10 AM.
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  #8  
Old 11-17-2016, 04:09 AM
Kevin Gullette Kevin Gullette is offline
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Lightbulb One BAD problem, with compressed loads.

That problem being, depending on neck tension, the bullet can......and sometimes WILL....be unpredictably pushed forward. Very BAD......!!

A good friend of mine once jammed a bullet, in his Ruger #1, and left a load of powder in the action.

Be careful.

Kevin
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  #9  
Old 11-17-2016, 04:21 AM
georgeld georgeld is offline
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Trouble with powders in AU.
They don't have access to the numbers we have.
So they don't have near the selection we do even
though ALL Hodgedon and a great many more are
mfg over there by ADI.
Plus, just because it's made there, don't make it
reasonably priced either. Most powders in AU cost
over $50-60 a pound. And we bitch at $25, now over
$33 or more. They'd be tickled to pay what we do
for ADI powders! Primers too are outrageously priced.

Enough that it makes me wonder how those guys even
get to shoot at all, let alone a lot like we take for granted.
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  #10  
Old 11-17-2016, 07:10 PM
tim simbari tim simbari is offline
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You want the same load with less compression, slowly pour it through a 10"-12" drop tube, you can vary your compression rate with your pour rate.
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