IMR 4166

[dbaird]

Anybody know what caliber the new Powder IMR 4166 is used for?

 

[jonbearman]

Go to the dailey bulletin and scroll to the bottom and hit the older entries and do it again like 3 more times and there is a good article on it.

 

[StevenDzupin]

FTI Look here: https://www.hodgdon.com/basic-manual-inquiry.html

Some data for some cartridges.

Regards,

Steve

 

[37Lincoln1]

This fine, extruded propellant is the first in the series of Enduron Technology powders. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. IMR 4166 is the perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. Positively, a versatile, match grade propellant.

http://www.imrpowder.com/shotpist.html

 

[snowpro440]

Would you say its better than 4064 or varget ? I guess it's just another way to sell more powder is to have manufacturers tell people its better than this or it's suited for these cartridges... Lol. I would be curious of the new LT 30 powder coming in January for the 6ppc.

 

[ShootDots]

There is no listing for it in the burn rate chart yet.. However, looking at the load data, I would say it is right in the vicinity of H4895 down to IMR 4320>>>Somewhere between them. It may prove to be as good as IMR 8208 is in it's respective burn rate range! I hope so!

 

[clowdis]

Agree, it looks to be somewhere around H4895 in burn rate. The thing that catches my attention in the load tables is the chamber pressure. On max loads of Varget and 4166 in the .308 with 155 grain bullet the 4166 is about 10,000 psi higher. But it's still in line with 4320 and a couple of others. Just wish the pressure was down a little, save some primer pockets!

 

[ShootDots]

I would like to try it in the 6 Dasher. However, it will have to go some distance to beat the load I have with Varget.. However, I am always up to trying new powders, bullets, etc..etc.. If pressure is "up there" it might be wise to try it in a bullet like a VLD where in the 6mm they appear to have a short bearing surface. Hopefully, you could get to 2950+, great accuracy and not destroy brass.. I will give it a shot before too long..

 

[jonbearman]

iTS BETWEEN VARGET AND REL 15.Caps on sorry.

 

[ShootDots]

Caps don't bother me at all Jon.. I use them for emphasis, not volume! LOL!!!

 

[MildBill]

the pressures listed at the hodgdon reloading site are not in the same units on the loads I looked at

varget and 4064 are in cup and the 4166 was in psi

hard to tell where it stands from that information

 

[jweb308]

I called IMR this week and spoke to one of their techs. He indicaated to me that 4166 falls between IMR 4064 and Hodgdon 4895. Time will tell.

 

[clowdis]

You're correct CUP vs. PSI and no way to convert. Should'a looked.

 

[timeout]

This fine, extruded propellant is the first in the series of Enduron Technology powders. The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly. IMR 4166 is the perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. Positively, a versatile, match grade propellant.

http://www.imrpowder.com/shotpist.html

I have recently tried the "Copper Fouling Eliminator" CFE223 by Hodgdon and while I can't vouch for its' copper fouling eliminating ability, I can say that it is the dirtiest burning powder I have ever used. Hopefully the IMR version is better. That being said, anyone looking to buy some CFE223?

 

[Beau]

Looking at the load data, 4166 appears to be 5 - 9% bulkier than Varget.

Hope it's closer to being only 5% bulkier, Varget is bulky enough.

 

[gaboon]

Is this a plot to go green or is this stuff a bunch of snake oil. I say if isn't broke don't fix it or mess with it.

 

[XTR]

I plugged in Varget, H4895 and IMR 4166 in the Hogden site using their generic 175gr bullet/24" barrel/WW brass and this is the comparison:

Varget	.308"	2.800"	42.0	2,583	42,600 CUP	45.0C	2,690	48,600 CUP
IMR 4166	.308"	2.800"	38.9	2,416	48,100 PSI	43.1C	2,652	60,100
H4895	.308"	2.800"	40.0	2,489	39,100 CUP	42.7	2,647	49,000 CUP

Pressures are a bit hard to correlate due to the PSI/CUP thing. I believe the SAAMI specs for .308 Winchester lists a 52,000 CUP / 62,000 PSI.

 

[bheadboy]

I ran data on 22-250, 50/55gr -- 7-08 140 ---308 150 and the interesting thing is 4166 is not as good in the 22-250 as other choices , pressure and velocity considered,

in the 7-08 it seems to gain traction and be slightly higher pressure based on Hodgden data

in the 308 it seems to hold ground with everytbing else but again, slightly higher pressure re velocity.

Bob

 

[GrocMax]

Large OEM's are the ones that push R&D in ALL sectors of mfg, in the case of propellants, that would be military contracts. EVERY rifle powder you can think of was a military powder first, so to think there isn't an improvement from generation to generation is foolish.

 

[CatShooter]

EVERY rifle powder you can think of was a military powder first...

Blatantly NOT TRUE!!