IMR 4320, what's the best use

[308sako]

With the current powder availability I've decided to get rid of all old stock, partial cans etc.

I found a few old metal IMR 4320 cans and decided to burn it up. .223, 6 XC (light bullets) .308, .30-06 what do you suggest?

 

[1idCat]

I've had good performance in .243 Win with 70 SMKs and in .223 Rem with 77 SMKs

 

[buffybuster]

It's a fine powder for .308Win loads and will probably work reasonably well with 30-06 as well.

 

[rw496]

I've been loading 30-06 with it and l like it.

 

[308sako]

Found a use, light bullets in the 6 XC.

62 Berger match at 3500 ft/secs

 

[Sargesniper]

Works very well in 22/250.

 

[1lnbrdg]

Just think Varget burn-rate area, not necessaliry the same weight in the cartridge though. Weight-wise, it's a little denser than Varget so more weight will go in a case. A bit more temp unstable than Varget but it's an extruded powder, should be more stable than most ball powders.

 

[BCP]

With the current powder availability I've decided to get rid of all old stock, partial cans etc.

I found a few old metal IMR 4320 cans and decided to burn it up. .223, 6 XC (light bullets) .308, .30-06 what do you suggest?

It's the most underrated powder out there.

Capable of making really good ammo, just a bit dirty and temp sensitive.

Also it shoots best near max.

 

[former naval person]

Good stuff. My .375-06 Imp loved it.

 

[armorpl8chikn]

It is a great powder. I have plenty of it for a rainy day. 223 with heavies like 77 and 80gr. 243Win with mid weights, fantastic in my 243. 308 and even 30-06 can be made to go bang. It is actually a very versatile powder.
Lets face it, we are now entering a time when you will judge the quality of your load by sound alone.

 

[Southwind]

Any one have any experience with this powder in .223 with 50-55gr bullets?

 

[308sako]

I think you will find it too slow for that purpose.

 

[81STFACP]

Works great pushing the heavy loads in M14/M1 type rifles. Got the load from the late Don McCoy for the M1 Garand he built for me. 4320 pushing the 190 SMKs, in my case I am using the Berger 185 HPBT LRs.

 

[smellnsweets]

Works great in a 7mm bore. Not as consistent in a .30 bore. Love it for the 7-08.

 

[former naval person]

Look on the 6mmBR website. The article "4320-the forgotten powder".

 

[delta 1/7]

How well does IMR4320 work in .308 using LC with 175SMK at 1k?

 

[ArmyJerry]

tagged

 

[malsa82]

I've used it in 308 with decent results but I haven't done a very extensive load work up. Maybe I will now...