What is the difference between AA 4350 & IMR 4350

[Rifleman]

Anybody know?

[Rifleman]

I guess I should be more specific, do they have virtually the same burn rate or is the AA faster then the IMR? Thanks?

[deadeye]

according to hodgdon burn chart aa is slightly slower
www.hodgdon.com/burn-rate.html

[Rifleman]

Thanks Rusty, it's a handy chart and I made me a copy for reference.

[deadon]

Feb 8, 2011 17:36:25 GMT -5 Rifleman said:

Thanks Rusty, it's a handy chart and I made me a copy for reference.

Your welcome but it was deadeye, not me. I wuda if I cuda Rusty

[Rifleman]

See why I need so much help?

[herman]

Have shot quit a bit of all three and from my experience the aa is a couple grs faster than the IMR and the Imr is a little faster than the Hodgen.
Even with that some lots withthe same powder is faster or slower.Thats why it is important to start a load lower and work up watching for pressure signs.
In my ruger 243 I am shooting 105 gr a-max with IMR 4350 and getting 3046 fps.It has a 26 in barrel with a 1:9 twist.
In my remington with a 1:1/8 twist it won't even shoot the 105's so my favorite load for it is the 85 BTHP sierras,useing H414.
If you look in hornadys burn chart you will see the listing;aa-103,IMR-106 and Hod-107.If you look at another chart it will probably be differant also.

[deadeye]

herman,great point as savage shooter educated me on this, powder manufacturers do not always extensively test their same # powder against their competitors,they just place it closely where they think it compares',more enough reason to start low & find out exactly within the lot# you are working

[Rifleman]

Well another thing some powders are the same thing made at the same place and then resold to the selling powder company and labeled differently. I think they like to keep us on our toes.

[herman]

You are right on fellows.reloading is no place to take chances.
I have shot a lot of the bulk powders over the years and with it you wouldn't want to start out with a max load.
My friend Bill and I bought three 8 lb jugs of 4895 bulk and since it wasn't labeled IMR or Hodgen we had to start and test to see what it was close too.It came out close to IMR.
The AA bulk powders you can go to their web site and they will give you loads to go by,but then again you don't start off with a max load.
There are some powders that are more dangerous with less amount than a little to much.Lighter charges of slow burning powders can cause detonation.
Loads you see on the internet,or even loads some friend gives you make sure you check them out with a reloading manual and still start out lower and work up.All rifles are differant as to max load it can take.
If you are going to use a lot of one certain powder buy several lbs and get the same lot number if buying one lb jugs or get a 5 lb or 8 lb jug.
If I run out of a certain powder I write down the lot number and when I pick up more of it I go through all of it on the shelf to see if I can get the same lot number.
Years ago a fellow came in the gun shop with his right hand missing and his face all screwed up.The owner ask him what had happened because he was wanting to know how to get in touch with a remington rep.And he said that his wife had gotten him a 270 remington for christmas and he shot one of his buddies RELOADS in it.