ponchh
Member
I will say one more time, slower burn equals more velocity.
Wow.Over simplified theory, pseudo science, and tongue in cheek rules of thumb....
Your problem is too slow a powder for a short barrel:
For a short barrel, use one of these powders:
Alliant AR-Comp
IMR 3031
Accurate 2495
Accurate 4064
Winchester 748
Accurate 2520
Your problem is too slow a powder for a short barrel:
GIGO Just because QL tells you H335 only gets an 85% burn doesn't make it so. If you use a NATO rates primer or a magnum primer that will change. You can not rely on one program to make your decisions. Shooting reloaded a real rifle will tell you different. Again, H335 is faster than all but one of the powders you listed and was used by the military. QL is not correct here and it's misleading you. (WC844=H335)Your problem is too slow a powder for a short barrel:
QUICKLOAD:
16" barrel
H335/21.6gr
55gr FMJ
2.190
33,577psi/2,524fps
Only 85% burn
(if actual barrel is only 14" -- then 2,422fps)
For a short barrel, use one of these powders:
Alliant AR-Comp
IMR 3031
Accurate 2495
Accurate 4064
Winchester 748
Accurate 2520
That about says it all.H335 is faster than all but one of the powders
I don't care what the program says,
Your problem is too slow a powder for a short barrel:
QUICKLOAD:
16" barrel
H335/21.6gr
55gr FMJ
2.190
33,577psi/2,524fps
Only 85% burn
(if actual barrel is only 14" -- then 2,422fps)
For a short barrel, use one of these powders:
Alliant AR-Comp
IMR 3031
Accurate 2495
Accurate 4064
Winchester 748
Accurate 2520
Ideas? Or Suggestions.
a thing that is accepted as true or as certain to happen, without proof.
I'm on board with that.I'll have to back off my blanket statement that H335 was too slow, and instead caveat the statement by saying that H335 was too slow at the pressures generated by a low powder charge.
See bottom Line of Post#38With so many models, chambers and other variation in AR 223 , live fire is the only way to know what works.
You need to sort of do both.My remaining question is what should I key off of? Take the FPS to 2900 and stop OR wait for the rounds to show signs of overpressure?
You apparently didn't read the implications of post #38Quickload is a great tool, but it certainly doesn't support ANY of your claims such H335 is too slow, and X, Y, and Z powders are better choices.
The OP did not load to the max charge. He was using the wrong data, data for an all copper bullet like I said in Post #9. The max charge according to Hodgdon is 25.3gr under that 55gr bullet the OP used.I see a lot of information here, but to answer your question, your chrono and scale are right, your technique is right, but you load is extremely light according to most sources. Unfortunately, the powder manufacturer is your source, and they are the safest one to trust.