Accurate Arms 4350 vs IMR 4350 vs H4350 vs Shooters World 4350

[Magic stick]

My .284 loves A4350. After I had this rifle chambered in 284 win I found 10lb’s of RL17 thinking that was going to be the “go to” for that cartridge. Long story short I still can’t get as consistent results as A4350 with any of the many many tunes I’ve tried with RL17. I just had some A4350 sitting around and tried it. I think I’m going to just give up on the RL and try to source some more Accurate.

What gr bullet you shoot with accurate 4350?

 

[D-4297]

Finally got around to testing my new lot of A-4350 , and this new batch is definitely faster than the older formula . Had to drop the powder load down , from 52.6gr to 51.8gr to get back to 2650 / 2660 range . So if you've gotten any of the "new" A-4350 , you may want to drop your charge by at least half a grain , if only to save on components .

 

[Buffguns]

Alliant Reloder17 has been a long time favorite for me in the 6.5 Creedmoor. It has always beat H4350 for velocity and (in my case) accuracy with most 140 class bullets. Accurate 4350 is right beside RL17 on the burn rate chart for what it's worth.
Accurate shows they developed load data at a max charge of 43.5 grains A4350 with 140 bullets.

http://www.ramshot.com/wp-content/uploads/2020/08/WesternPowdersHandloadingGuide8.0_WEB.pdf

Hodgdon stops at 40 H4350 and 41 of IMR4350 at slightly lower pressure.

Reloading Data Center

www.hodgdonreloading.com

While Hodgdon always seems to be a bit under max SAAMI pressure with their top end loads I notice Accurate is closer to the top level.
Your rifle will determine the accuracy you get and that will likely mean you need to do some testing to get into the proper node for best performance.
Remember that burn rate and pressure produced are two separate lines on the graph. A powder that seems the same on the burn rate may likely produce a totally different pressure curve.

Same experience with my 6.5 Creedmoor loads. ReLodr 17 gives at least 150 fps with 140 grain bullets over the max H4350 can produce. Silver Mountain Target Solo system says my bullets impact a 1,000 yard target at about 1700 fps (range elevation 2615 feet). I save my H4350 for 6mm Creedmoor loads with 105 grain pills.

 

[HammerShed]

I have a new 308 rifle with a 16" barrel. I also have 5lbs of Accurate 4350. I have been looking everywhere for my favorite H4895 with zero luck and it seems to me that there are several vendors with more Accurate 4350 available. Has anyone used Accurate 4350 with 308?

 

[358WCF]

I have a new 308 rifle with a 16" barrel. I also have 5lbs of Accurate 4350. I have been looking everywhere for my favorite H4895 with zero luck and it seems to me that there are several vendors with more Accurate 4350 available. Has anyone used Accurate 4350 with 308?

No. It's too slow. Western doesn't even have data for it in their last annual before Hodgdon bought them.

 

[CA_Shooter]

With the component shortage, looks like I'll be trying out that AA4350 in my 284 Shehane. If nothing else, to use it for the first 150 rounds of the barrel life