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DEAL ALERT - pulldown rifle powder

davedude

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M829A3

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Wow going to try in in .06? Seems a bit fast for that. I have been looking about on 735. Some burn rate charts have it close or over the rate of 322, others put it near Tac or BLC2, then others have TAC and BLC2 several notches apart. Not sure what to think.

Going to be working up some WC 846 pull down, in 06, that i picked up about 3 years or so back. I don't have a chrono, so I work off of pressure signs and book data, haven't died yet.... but it's always an option, no matter what you do.
 
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W.E.G.

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30-06

I prepared 40 primed cases in short notice.

I goofed and loaded 10 rounds of the lightest load.
(Meant to load only 8)

So to get back on track with my allotment, I only get 6 rounds of the second lowest.

Managed to pay attention to WTF I was doing for 46-48 grains

IMG_2025.jpeg
 

W.E.G.

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Completed some testing today on the CDVS pulldown "223" powder.

This powder is slower than what I would normally regard as "223" powder.
Definitely not "like H-335"
This powder is a relatively slow-burning powder. Far slower than H-335

I think it will be a good powder for 5.56 and 7.62 NATO.
Although, don't look for screamer velocities with this stuff.

I am not at all keen on it for 30-06. The loading density is too low (too much air in the case).
I had delayed-ignition issues with 50% of the 30-06 rounds fired today.
When fired today in 30-06 Garand, I could literally hear three distinct sounds when I pulled the trigger. I could hear the sear release "tick," then the hammer fall "ting," then the ignition of the powder "boom." Very weird. First time I've ever experienced that.

Velocities in the 30-06 were extremely erratic - varying by as much as 400 fps from shot-to-shot.

Its possible that simply "sticking more powder in it" might eliminate the delayed-ignition issues with the 30-06. But I'm not interested in testing that. If 49.0 grains of a powder won't drive a 150-grain bullet without delayed-ignition shenanigans, that powder is simply not suited for the caliber, and I'm done trying to force it to work.

Velocities were consistent with 7.62 NATO and 5.56.

The delayed-ignition thing only happened with 30-06. There were no delayed-ignition incidents with 7.62 NATO or 5.56.

Because I had been of the mistaken belief that this powder was "like H-335" my test loads erred toward lower powder charges.

44.0 grains is going to be a good load with a 145-150 grain bullet in 7.62 NATO

The heaviest load I actually tested with the 69-grain bullet in 5.56 today was only 24.0 grains. That load clocked slower than my "sighter load," I think 24.5 - 24.8 grains is going to be the better load for the 69-grain bullet. I will load some of those and test as opportunity allows.

The "sighter" loads used today to establish comparison-velocities were known-good loads for each respective caliber.
The idea being that some notch on each respective ladders tested would generate a velocity very close to one of the known-good loads.
This objective was achieved only with 7.62 NATO today. 44.0 grains of the pulldown powder with a 150-grain bullet will very likely serve you well. As already mentioned, the 30-06 test failed to identify any load that is even reliable. The 5.56 loads tested, while they functioned fine in the gun, and seemed accurate enough, just were falling short on velocity. I will be "sticking more powder in it" with the 5.56, and I expect good results. Probably going to be 24.8 grains with a 69.

I did not test closely for accuracy today. I was firing on an electronic target. Groups for the 7.62 NATO and 5.56 looked typical for the guns and my ability. The groups for the 30-06 were horrible - due in no small part to my flinching during the 30-06 delayed-ignition.

If I had to say this powder is "like" some conmmonly-known powder, I would say its probably somewhere between VARGET and your favorite flavor of 4350.

VELOCITY TEST - CDVS PULLDOWN POWDER.jpg
 

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ftierson

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44.0 grains of AA2520 in LC07/09 cases with CCI 34 primers and the Hornady 150gr FMJBT 3037B bullet produced an instrumental velocity at 7 ft of 2765fps out of a 20in barreled RRA LAR-8 (temp around 78 degrees F)...

As a comparison for burning rate...

Forrest
 

W.E.G.

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44.0 grains of AA2520 in LC07/09 cases with CCI 34 primers and the Hornady 150gr FMJBT 3037B bullet produced an instrumental velocity at 7 ft of 2765fps out of a 20in barreled RRA LAR-8 (temp around 78 degrees F)...

As a comparison for burning rate...

Forrest
There ya go

I’ll agree it acts “like” 2520
 

M829A3

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My guess is it's not SMP 735, as most charts show it as fast H 335 or faster. It looks a lot like my last batch of real BLC2, but don't most ball 'ish" powders. My WC846, pull down,(also looks like BLC2), was cratering primers and giving ejector punches, at 47.5 with 150s, and a hell of a kick, out of an 18in PSA 10, when I finally got it working, lol.

Using Hornady's standard ballistic calculator and your numbers , I would say muzzle velocity on your 1st .308 load was about 2500 fps. Definitely in a usable range with more fps possible.
Your 44 gr. load hit within 20fps or so of the calculated 2800 FPS MV
 
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ftierson

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And the same components shot at the same time in the same RRA LAR-8 but with 44.0 grains of AA2460 produced 2833fps with an extreme variation of 52fps and an SD of 20.8fps (for five rounds)...

Pushing towards pressure 'limits' almost always has a negative effect on 'consistency.'

For example, the AA2520 load mentioned, when increased to 45.0 grains of AA2520, produced an instrumental velocity of 2849fps, but with an extreme variation of 60fps and an SD of 24.0fps (for five rounds)...

Just sayin'...

Forrest

Edited to spell 'of' right... :)
 
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W.E.G.

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I think a 52-53 gr load in 30.06 would put you in the 2700 range. Your number track fairly closely with the expected MV of Hodgdons BLC2 loads.
It might stop the click-boom shenanigans at some point well north of 50 grains. But at that point, we are absorbing recoil from a “stout load.” No thank you.

When I shoot the Garand, it’s usually some sort of competition at 200 yards, where the course of fire is many dozens of rounds. The only ammunition I want in that situation is the lightest load that will travel 200 yards accurately and reliably. My days of eating a face-pounding, and waking up the next day with a swolen face - I hope - are behind me.

I ate about 100 rounds of Garand recoil (most of it piddly) yesterday, and I’m feeling it now. I used to let people punch me in the head just for fun too. I gotta work smarter at this point.
 
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