I picked up a Handloader magazine the other day and their was an ad for IMR 4007 SSC powder. Is this new? What is is for and what is the burn rate in relationship to other powders?

quote:

Originally posted by army aviator:
I picked up a Handloader magazine the other day and their was an ad for IMR 4007 SSC powder. Is this new? What is is for and what is the burn rate in relationship to other powders?

It's new, and I have no idea what it is intended for.......

quote:

4007 SSC powder

Thanks for the heads up.
I have a bunch of IMR 4064 to shoot up, afterthat this looks like an interesting for the 308 and the 405.

Jim
Found this:

Shawnee Mission Kansas, IMR-Legendary Powders, the innovator of super short cut technology introduces IMR 4007 SSC. You may want to get out your chronograph and see the difference this powder makes as it falls between IMR 4350 and 4064. "SSC" or Super Short Cut powder translates into charge weight consistency ergo accuracy. This important feature of 4007 SSC means the powder easily and accurately flows through the powder measure.

It's shortened grain drops smoothly into small case necks making it perfect for classic varmint cartridges like the 22-250, 220 Swift and 243 Winchester. Users of popular big game cartridges such as the 30-06, 300 Winchester Short Magnum and 7mm Winchester Short Magnum can attain top velocities typical of extruded powders, with the precision metering inherent in this new product.

Additionally, the short powder grains permit ideal load density, making top velocities achievable where a bulkier long grained propellants fall short.

Here are three classic cartridges that produce outstanding velocities with IMR 4007 SSC:

22-250 Remington 55 grain bullet, 39 grains IMR 4007 SSC=3,786fps
220 Swift 50 grain bullet, 43 grains IMR 4007 SSC=3,922fps
30/06 150 grain bullet, 55.3 grains IMR 4007 SSC=2,972fps
Look for IMR 4007 SSC in one pound bottles and eight pound kegs at favorite IMR dealers everywhere Spring 2007. Check for complete reloading data late Winter 2007 at imrpowder.com or write to IMR Powder Co., 6231 Robinson, Shawnee Mission, KS 66202.

Found this:
Shawnee Mission Kansas, IMR-Legendary Powders, the innovator of super short cut technology introduces IMR 4007 SSC. You may want to get out your chronograph and see the difference this powder makes as it falls between IMR 4350 and 4064. "SSC" or Super Short Cut powder translates into charge weight consistency ergo accuracy. This important feature of 4007 SSC means the powder easily and accurately flows through the powder measure.

It's shortened grain drops smoothly into small case necks making it perfect for classic varmint cartridges like the 22-250, 220 Swift and 243 Winchester. Users of popular big game cartridges such as the 30-06, 300 Winchester Short Magnum and 7mm Winchester Short Magnum can attain top velocities typical of extruded powders, with the precision metering inherent in this new product.

Additionally, the short powder grains permit ideal load density, making top velocities achievable where a bulkier long grained propellants fall short.

Here are three classic cartridges that produce outstanding velocities with IMR 4007 SSC:

22-250 Remington 55 grain bullet, 39 grains IMR 4007 SSC=3,786fps
220 Swift 50 grain bullet, 43 grains IMR 4007 SSC=3,922fps
30/06 150 grain bullet, 55.3 grains IMR 4007 SSC=2,972fps
Look for IMR 4007 SSC in one pound bottles and eight pound kegs at favorite IMR dealers everywhere Spring 2007. Check for complete reloading data late Winter 2007 at imrpowder.com or write to IMR Powder Co., 6231 Robinson, Shawnee Mission, KS 66202.

By their .220 loads, it appears to be between 4064 and 4350, which is pretty useful. It could be really good in a .375, 9.3x62 and .338-06 as well.

quote:

Originally posted by jstevens:
By their .220 loads, it appears to be between 4064 and 4350, which is pretty useful. It could be really good in a .375, 9.3x62 and .338-06 as well.

Hmmmm...........Between IMR 4064 and IMR 4350... so it's close to IMR 4320, WW 748, and H380.......

To date, they have no load information for the 25-06 or for the 300 Win Mag, so I am assuming the powder does not lend itself to overbore cartridges.

I think I'll hold off till I see more loading data.

quote:

Hmmmm...........Between IMR 4064 and IMR 4350... so it's close to IMR 4320, WW 748, and H380.......

El Deguello
{I'm pulling your leg, joke!}
Are you so cynical that you refuse to believe that this powder is not the answer to all of your loading problems?
Jim

Hodgdon has 4007ssc load data online for appropriate calibers:

Hodgdon

quote:

Between IMR 4064 and IMR 4350... so it's close to IMR 4320, WW 748, and H380.......

Makes me wonder if IMR 4320, or H 380 or 748 isn't being speculated for retirement!

There's a pretty big gap in the burning rate between IMR-4320 and IMR-4350. It is my impression that IMR-4007 is supposed to fall into this gap and also provide an easily-metered powder. Sounds like it will be close to Varget.

It is in the same theoretical burning range as H-380, but H-380 has always been and extremely temperamental powder for me that exhibits some variation in its relative burning rate according to the size of the case and the weight of the bullet. In other words, the burning characteristics of H-380 are not linear, as one expects with the IMR-series.

IMR-4007 is certainly welcome, but it would have been nice to have had it about 40 years ago!

It sounds like a great powder for the 260, 243, 6mm Rem, 7 x 57, 6.5 x 55, 257 Roberts class of cartridges...

Sounds to me like it's a powder I've been wanting a long time a sort of VVN155.

I've allways thought there was a gap in single base powders twixt 4064 and 4350 or N150 and N160.

Ball powders may fill the gap but not everyone wants the muzzle flash or dirt.