Hodgdon H335 Temp Stability ?

[wedgy]

I can't seem to find a number for it on any of the charts. It is listed as giving the highest velocity in .223 with a particular bullet but I don't want to use it if it isn't reasonably stable.

 

[K22]

I used it for years in 223 Rem bolt rifles. My experience is that it was an outstandingly accurate powder with 50 and 55 grain bullets in my 12" twist rifles. The only reason I switch to extruded powder is that I varmint hunt in the summer and exposed to high temperatures in open fields. I began to see some signs of pressure surges, not anywhere as bad as H380 in my 22 250.

So, depending on your shooting discipline and shooting conditions, but I wouldn't let that keep me from trying it if all you do is range shooting under cover.

 

[wedgy]

It gets well over 100F all summer here, that's why I am asking. Thanks for sharing so I don't have to find out and work up another load ! I will probably go with H4895 then, about 50 fps less but stable.
Is there a reason H335 isn't listed on any of the charts ?

 

[JB10]

I have shot in 100+ temp days, although not often and not had any issues. This was all with 55gr fmj in an AR near max. I also shoot 50gr vmax in another AR dedicated for coyotes but that is a winter gun. I think id find a load that works in ur rifle and as long as ur not max or over i would think you should be fine.

 

[JSH]

Work loads up at the temp you will be using them.
I shot a LOT of H335 till I was told it wouldn’t work, majority in 223 and wildcats from that case. Majority of my development and shooting was in the summer. I honestly think some leave their ammo on the dash or direct sun to make their observations. I went back to H335 and run it on colony varmints, I keep it in the shade or out direct sunlight no issues.
A load worked up in July-August may show diminishing returns in December-February but what powders don’t?
I also realize some parts of the country have huge temp swings, that may well be what we hear a lot about.

 

[SeabeeKen]

Playing with it in grt it shows about 2000 psi difference between 70° and 110°. About 42 fps difference. Quickload showed 3000 psi difference

 

[SVT_Tactical]

I've played with h335 in 223 and the 260 now. Loads near max in the 223 in cooler weather could not be duplicated in summer without sticky bolt lift.

 

[boltfluter]

H335 temperature stability - it has none! But it is still my favorite. 223 powder of all. Maybe run a summer and winter load, seems like it may work. Just a thought.
Paul

 

[SecondsCount]

Years ago, when I first started loading 223, I used H335 with great success. My loads were below maximum and I never had any issues with pressure, even on hot days shooting prairie dogs.

I made the switch to VihtaVuori N135 because I liked how clean it burned.

 

[RabbitSlayer]

Its well known to be more temp sensitive than most powders. Probably fine if you are not near max. I had 8lbs i got when there was nothing else. Sold it for more than I paid and got n133 instead.

 

[mgunderson]

Temp instability is something that you adapt to if desired. Not my primary focus on picking a powder. July and August are great months to refine the powder charge to keep myself out of sticky bolt trouble. Just my opinion.

 

[Doom]

H335 at max loads on a mild day can lock your bolt up on a hot summer day! Ask me how I know. I quit using it after that experience because I didn't want to develop a summer and a winter load. The weather is too inconsistent here.

If I were loading for a AR in volume I would go back to it. But for my bolt action I like IMR 8208 and N135.

 

[Fast14riot]

I shoot 335 in my 6.8, I develop my load during the summer and in winter I add a tenth or 2 to get back to my accurate load.

 

[D-4297]

Was loading 335 for a "Bud" with a AR ; in the winter months here in Arizona , and it gave him decent groups and was consistent . Then he went shooting in July with the same load . Not a pretty sight . It locked up the Bolt after about fifteen rounds , and we had to put the rifle in the Truck with AC running to cool it off to get the bolt to release . I still have most of that pound sitting on my shelf . Guess I'll load some .308 Hunting rounds with it .

 

[Timon]

If you are shooting light 50-55’s, I might consider Benchmark, or N133. The Benchmark is more stable than the N133, but the N133 gives outstanding results with light 223’s.

 

[Gary in MD]

I've been using Benchmark in a 223 & 223AI, so far so good.

 

[SeabeeKen]

Its well known to be more temp sensitive than most powders. Probably fine if you are not near max. I had 8lbs i got when there was nothing else. Sold it for more than I paid and got n133 instead.

N-133 shot great in my rifle with 55 gr bullets and N-135 shoots awesome with the 77 gr

 

[762willdo]

This may be helpful…..

Temperature Sensitivity of Powders for .223 High Power Service Rifle

 

[wedgy]

This may be helpful…..

Temperature Sensitivity of Powders for .223 High Power Service Rifle

Interesting it shows IMR 4166 as being very stable but again its number is not on the chart. The website lists it as being insensitive to temperature changes, and more importantly it is environmentally friendly !! LOL
"The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly."
This chart shows it not being as stable with a 45 fps swing compared to ~20 fps for Varget. Looks like Benchmark and or N133 will be my choice.

 

[Zero333]

H-335 is not bad, but I prefer Win-748 for a ball powder with great accuracy and decent temp stability.

H-335 is accurate Most of the time, while Win-748 seems to be always accurate.
However.... Win-748 is a bit slower burning.

I've tested velocities down to -25 c ( -13 f ).... All I can say is at that temp ALL POWDERS regardless how temp stable they might be above 0 c plummet velocities like bricks.