IMR 4320 and the 6.5 Creedmoor

[coorslight]

I have 2 lbs of IMR 4320 I would like to use up in my 6.5 creedmoor, mostly to use for plinking steel. Noticed its right there with Varget on the burn rate chart. Not finding any data I know it's discontinued thats why I figured I would use it up. Any suggestions.

 

[Just Say Moe]

Nosler has some for 90grain bullets

 

[jds holler]

I have 2 lbs of IMR 4320 I would like to use up in my 6.5 creedmoor, mostly to use for plinking steel. Noticed its right there with Varget on the burn rate chart. Not finding any data I know it's discontinued thats why I figured I would use it up. Any suggestions.

I'd be interested in what ya come up with, and how you do. I've got about ten pounds of 4320, and hope to try it on a buds Creed. New rifle, new brass, new dies, -- hoping to land on something good without working at it. I'd love to not have to go looking for powder.

Remember when you could pop on down to BiMart, and pick up an eight pounder of rifle powder for fifty or sixty bucks. I'm thinking that one is from mid seventies. jd

 

[capper599]

I have 2 lbs of IMR 4320

Those are really getting hard to find now that they are discontinued. It's my go-to 22-250 powder along with a 55 gr. Ballistic Tip. Have used it with satisfaction in 6.5 creedmoor, it’s close to h4350 burn rate if that helps you.. The stable match is close to varget....

I know what other powders are in that ball park. But what's the best powder to use when I'd really like to get my hands on some IMR-4320 and it's unobtanium ? What a bummer. Think I only have about a pound left.

 

[jds holler]

Those are really getting hard to find now that they are discontinued. It's my go-to 22-250 powder along with a 55 gr. Ballistic Tip. Have used it with satisfaction in 6.5 creedmoor, it’s close to h4350 burn rate if that helps you.. The stable match is close to varget....

I know what other powders are in that ball park. But what's the best powder to use when I'd really like to get my hands on some IMR-4320 and it's unobtanium ? What a bummer. Think I only have about a pound left.

I've got this keg, and a couple of pounders which have been opened. I inherited it from a pard maybe ten years ago, and haven't messed with it -- yet.

What range of bullet weights have you used it with in the creed. I believe we're gonna be with 140's

When I get to looking at the data and stats on this Creedmoor thing, I'm thinking "What the hell!!" I don't quite get it. jd

 

[SecondsCount]

I have tried it in 6.5X47.

33.5 4320
CCI 450
123 Nosler CC

I did not chrono it but accuracy average .46 MOA from two 5 shot groups, and was hitting 2 MOA steel from 300 to 1000 yards.

 

[Gabe22BR]

To bad they quit making 4320-
I had several loads worked up in my competition rifles- recommended by great friend…..
I have since gone to a powder that won’t be discontinued any time soon…

 

[Ned Ludd]

In my hands using .308 Win with 185s, IMR 4320 was pretty much interchangeable with Varget in terms of velocity from a given charge weight; they're very close. Precision was also similar. I'd imagine they wouldn't be too far from one another in the 6.5 Creedmoor. In my hands, the most noticeable difference between 4320 and Varget was at the upper end of the charge weight range, where the transition of 4320 to an "over-pressure" condition was more abrupt than Varget. For that reason, you could probably start at the low end of suggested Varget loads, but work up carefully and be prepared to stop if/when you encounter any pressure signs.

 

[coorslight]

In my hands using .308 Win with 185s, IMR 4320 was pretty much interchangeable with Varget in terms of velocity from a given charge weight; they're very close. Precision was also similar. I'd imagine they wouldn't be too far from one another in the 6.5 Creedmoor. In my hands, the most noticeable difference between 4320 and Varget was at the upper end of the charge weight range, where the transition of 4320 to an "over-pressure" condition was more abrupt than Varget. For that reason, you could probably start at the low end of suggested Varget loads, but work up carefully and be prepared to stop if/when you encounter any pressure signs.

Thank You, that's kind of the way I was thinking, similar to Varget.

 

[Guybo]

I can't speak for the Creedmoor but IMR4320 was a diamond in the rough for my daughter's Model 7 .260 rem, it was very accurate and consistent. It shot just as accurate in her 700 SPS .260 with the same bullet. The Sierra 120gr PH is the only bullet we've used with that powder thus far but it worked extremely well.