Does H-335 burn too hot? Will that damage chamber/throat or barrel?

[valleyforge.1777]

I have used H-335 for 223 reloading with good success in terms of results when the rounds are fired. It does meter very nicely in my Dillon XL650 and it seems like a good powder to work with. I can use it for the other rifle calibers I load for; 30-30 and 7.7x58 Japanese Arisaka. However, everyone tells me that it makes a very big flash of fire out the muzzle end of the barrel when rounds are fired. That has scared me away from using it. I worry that if that much flash of fire is coming out the muzzle, I wonder if it is burning too hot by which I mean is it burning so hot that it will cause premature throat erosion or otherwise damage the barrel or chamber? It seems to be a pretty popular powder. Is there any reason for me to be concerned?
For comparison, I also use CFE223 for 223 and 30-30, Win 748 for 223, and IMR 4064 for the 7.7 Japanese. I used IMR 3031 for 30-30 but the 3031 and 4064 do not meter well enough for me in the Dillon powder measure, so I use an RCBS Chargemaster Lite to measure out each charge, which is slower than I want to go. I found that CFE223 meters very well and gives me better accuracy in my Model 94's than 3031 anyway, so I switched over for 30-30. For the 7.7 Japanese, I just put up with the slowness of measuring each charge with the Chargemaster Lite and that's OK. My Arisaka is amazingly accurate for what it is and I don't make too much ammo for it anyway, so I am OK using 4064 and measuring each charge individually. But anyway, back to the point of my post, what about that big flash of fire with H-335? Is that a reason for concern?

 

[Charlie98]

I, too, use H335 for 5.56mm, it's a good powder. Your rate of fire will dictate throat erosion more than the specific powder you are using.

 

[Allen One1]

H335 is good to go in the 223 with 55 gr bullets.

 

[243winxb]

http://www.firearmsid.com/Feature Articles/McCord_gunpowder/

But anyway, back to the point of my post, what about that big flash of fire with H-335? Is that a reason for concern?

Flash happens when hot gas mixes with the air. Not a problem, as it happens outside the barrel.

Double base powder may burn a little hotter then single base. But is not a big issue in barrel life.

As said above, rate of fire is. For longer barrel life, M16s have chrome barrels to reduce wear.

QL temperature chart.



Compare the V V singe N100 series to double based N500 Series powders.

The faster burn rate of the powder would seem to increase heat. Its not always the Nitro in double based powders.

Use the powder that best suits your needs.

 

[FROGO207]

The flash the Russians get when they shoot those Mosins is enough to light the back yard for a BBQ! There seems to be no undue throat erosion in those. Tyring to run full auto without a crome lined barrel MIGHT cause problems but really, who does that. Anyway there are many propellants out there to try if you want less flash. I use Tac in all my 223/5.56 loads and it does fine.

 

[valleyforge.1777]

Definitely makes a good case for slowing down the rate of fire.

Anyone know the relative burn temp for CFE223, at least compared to other common AR powders such as Win 748 and H-335?

The AR's and the Arisaka have chrome lined barrels.
However, the throat of the AR is vulnerable as the chrome lining does not last long (I believe that is the consensus that John Farnum among others, espouses.) On the other hand AR uppers are not rare, and are readily replaceable.

Old Model 94s, chamber and barrel not replaceable.

My Arisaka is a great rifle in terms of accuracy, far better than most of them. But once it is gone (shot out) it is gone so I am being very careful with that. I have been told I can expect about 7,500 rounds before it is shot out, depending on rate of fire, load, powder, etc.

 

[forrest r]

Switch over to cast bullets in the 30-30 and arisaka and use h335 with the cast bullets.

What a 308w throat looked like at the 1000 round mark with +/- 500 rounds of cast bullets and pistol powders in the 25,000psi range. the other +/- 500 rounds were with h335 in the 30,000psi to 40,000+psi range.


No heat cracking, blisters, erosion, nada.

 

[ArchAngelCD]

I have never had a problem with H335 and use almost nothing else for the .223/5.56mm. Flash doesn't always translate into excessive heat.

 

[jhansman]

H335 is good to go in the 223 with 55 gr bullets.

This. H335 is likely the most popular powder for .223 autoloaders. It's all I use in my Saiga, no burn, no worries.

 

[Metal God]

H-335 burns very hot compared to others . I just confirmed this on Monday . I have used it exclusively for my AR 55gr plinking load . I recently bought an AR-10 and wanted a better metering powder then the long extruded powders I use fir all my other 308 rifles .

I loaded up a bunch pushing the 150gr FMJ-BT projectiles . When picking up the cases right after firing HOLY CRAP they were HOT !!! Just like my 5.56 cases are after ejection . Way hotter then IMR 4895/4064 , AR-Comp , Varget etc ,

Does this mean you’ll get more throat erosion? Not sure , I’m sure all powder is pretty hot in the barrel as it burns . But H-335 is now added to my list of hot burning powders along with Titegroup & CFE-Pistol

 

[Toprudder]

H-335 burns very hot compared to others . I just confirmed this on Monday . I have used it exclusively for my AR 55gr plinking load . I recently bought an AR-10 and wanted a better metering powder then the long extruded powders I use fir all my other 308 rifles .

I loaded up a bunch pushing the 150gr FMJ-BT projectiles . When picking up the cases right after firing HOLY CRAP they were HOT !!! Just like my 5.56 cases are after ejection . Way hotter then IMR 4895/4064 , AR-Comp , Varget etc ,

Does this mean you’ll get more throat erosion? Not sure , I’m sure all powder is pretty hot in the barrel as it burns . But H-335 is now added to my list of hot burning powders along with Titegroup & CFE-Pistol

Add H-322 to that list. I noticed it heats up the barrel quicker than H-335.

 

[valleyforge.1777]

What about CFE223?
How does its burn temp compare to H-335? or, to 748?

 

[Average Joe]

I have found that H335 does burn hot, I have since switched over to W748 which seems to be a little cooler. Not a scientific study, just my opinion.