Accurate 4350: Low Velocities

[Lefty7mmstw]

I've got 2lbs of Accurate 4350 I picked up in April brand new from Midway.
I've loaded this powder in 6.5 Creedmoor and .270.

In the 6.5 Creedmoor I barely made it to 2600 FPS in a 24" barrel Tikka with 143 grain ELD-X.

Today in a 22" barrel Tikka .270 best I could get was 2750 FPS with a 130 grain Interlock at 55.5 grains. I was right on the edge of pressure signs.

SD and ES numbers were acceptable but this powder is awful for velocity. Did I get a bad batch?

yup... that's why I don't load aa4350

 

[Veteran]

Also, the original reason the OP gave for trying Accurate 4350 as a substitute for IMR 4350 or H4350
are at this time completely out the window.

You can buy H4350 or IMR 4350 in at least 3 to 5 stores online right this very minute.

They have in the last 2 or 3 weeks become very very widely available and stay in stock all day long.

Imagine that.

 

[Lefty7mmstw]

Theres a ton of IMR 4350 for sale right now. Its supposed to be good substitute for H4350. Maybe thise who are using it can say?

I'd rather burn I4350 than H4350. The only reason h4350 is even in the house is the little orphan creed shot well with it when I adopted it...

 

[Lefty7mmstw]

57-59 gr A4350 behind 165-180 bullets is all i've shot in ''06 last 40 yrs. Too many animals to list have succumbed to this combo......Probably 5 different 3006's. Load it and good skill is all that's required to accomplish the mission.

I've been burning 57.5 I4350 with 165 hdy fired by 215's for 25+ years in 30-06 rifles... every one has eaten it at least decently... usually between 2800-2900 fps.

 

[Lefty7mmstw]

Also, the original reason the OP gave for trying Accurate 4350 as a substitute for IMR 4350 or H4350
are at this time completely out the window.

You can buy H4350 or IMR 4350 in at least 3 to 5 stores online right this very minute.

They have in the last 2 or 3 weeks become very very widely available and stay in stock all day long.

Imagine that.

at 50 a # or better they will probably be dusty by the time anyone buys them... I'm moving on from some of these powders. My big rifles are going to be burning a bunch of wc872 for the foreseeable future it seems...

 

[Veteran]

at 50 a # or better they will probably be dusty by the time anyone buys them... I'm moving on from some of these powders. My big rifles are going to be burning a bunch of wc872 for the foreseeable future it seems...

Ive seen a bunch of H4350 at 43 to 44 dollars per lb lately.

Just dont buy at Midway or the Hodgdon store itself.

 

[chevrolet71]

Accurate 4350 is a much slower powder than H4350 and IMR 4350.

Now, if you use a lot more charge of Accurate 4350 which is a slower powder and you have a fairly long barrel, I'm not saying you can't get the same or more velocity versus H4350 or IMR 4350, if your load does not pressure out before then, but it will take you more powder charge and a longer barrel maybe to get the same velocity as H4350 and IMR 4350 with Accurate 4350.

Here are the relative burn rates taken from Quick Load.

Powder		Burn Rate
IMR 4350		0.515		Faster
H 4350		0.513
Accurate 4350		0.381		Slower

This shows the relative burn rate and are an indication of the corresponding initial pressures you will get from each of these powders.

Pressures and velocities from the top 2 will be higher and at quicker velocity than for Accurate 4350. So, if case capacity will allow, and
and your barrel length is a little longer, maybe you can work up to pressure with Accurate 4350 and still get the same velocities you were getting with the other 2 powders, but maybe not, and at the same charge weight, no way.

This was all explained previously in this thread I believe if you go back over the whole thread. Burn rate charts are not very useful when looking at these types of questions. They only get you in a certain ball park but are not very defining.

Hope that helps.

Thanks for the information, not looking to get the max speed out of it 2700 fps will get ur done and shoots a tight group.

 

[Veteran]

Thanks for the information, not looking to get the max speed out of it 2700 fps will get ur done and shoots a tight group.

Yep, if it works, its plenty fine. Don't Fix it if it aint broke.