[yellowmenace]

On IMR's web page they list a max load of 23.9 gr of IMR 4227 behind a 90 gr HP. I had some 4227 just sitting there going to waste so I thought I'd try it, starting with 23.5 gr. This load won't cycle the action on my AR. I used some Winchester WSR primers that I'd had for a while and I've had the 4227 for a while, but it should all still be ok.

Has anyone tried a similar load with this powder?

I did look at the sticky load data post and it listed a 100 gr bullet with quite a bit more powder than this. Am I loading too light, even though I'm near the max listed by IMR?

It got too dark to chronograph the load, so I'll do that tomorrow. If this is just a weak load, I'll probably switch to one of my more popular powders. I use a lot of IMR 4895 and I just bought some Ramshot that shows more pressure in their max loads and slightly higher velocity. I just wanted to use up the 4227 since I don't use it for anything else these days.

 

[paulosantos]

Which AR do you have? IMR 4227 is very fast and will have a hard time cycling, especially if you have a Midlength Gas System. You can probably go up to 24.5 or higher, depending on the barrel. Make sure you have the lightest buffer and spring.

 

[yellowmenace]

Which AR do you have? IMR 4227 is very fast and will have a hard time cycling, especially if you have a Midlength Gas System. You can probably go up to 24.5 or higher, depending on the barrel. Make sure you have the lightest buffer and spring.

I was afraid it might be a bit fast. If memory serves me, I bought it to load some 45 colt rifle rounds or some 44 mag hunting rounds. Can't remember for sure, but I know it was something that I didn't load much of and havent' loaded in a while.

I actually put my 6.8 upper on a used lower that I bought under a 9mm conversion so I'd think it had a pretty light buffer and spring but maybe not. I'm looking for the specs on the upper but haven't found them yet. It was made by Denny at Global Tactical and has a stainless barrel that seems pretty heavy. I bought it used too.

 

[paulosantos]

Which AR do you have? IMR 4227 is very fast and will have a hard time cycling, especially if you have a Midlength Gas System. You can probably go up to 24.5 or higher, depending on the barrel. Make sure you have the lightest buffer and spring.

I was afraid it might be a bit fast. If memory serves me, I bought it to load some 45 colt rifle rounds or some 44 mag hunting rounds. Can't remember for sure, but I know it was something that I didn't load much of and havent' loaded in a while.

I actually put my 6.8 upper on a used lower that I bought under a 9mm conversion so I'd think it had a pretty light buffer and spring but maybe not. I'm looking for the specs on the upper but haven't found them yet. It was made by Denny at Global Tactical and has a stainless barrel that seems pretty heavy. I bought it used too.

If it is the 16" barrel, it has the Midlength Gas System. It is a great barrel. YOu will have trouble getting it to cycle with that powder.

 

[yellowmenace]

Which AR do you have? IMR 4227 is very fast and will have a hard time cycling, especially if you have a Midlength Gas System. You can probably go up to 24.5 or higher, depending on the barrel. Make sure you have the lightest buffer and spring.

That was kinda what I suspected. I'll probably shoot up what I loaded and switch to either IMR4895 or Ramshot X-terminator. I almost used the latter to begin with, but I cheaped out and tried to use up some powder that I didn't need anymore. Somehow that kind of stuff never works out.

On the plus side, this load is pretty accurate if any bolt action guys are looking at this thread later.

It also shot about 1-2" higher at 100 yds than SSA 100gr HP factory load.

 

[mto7464]

I know this is bringing up an old thread, but tried some imr4227 this weekend, since I too had it lying around, and it also would not cycle in my 16" arp barrel. Deadly accurate though. AA2200 just shoots awful and shows pressure signs using data that other have great results from, but 4198 shoots as well as the 4227 but functions the rifle well, just do not have much of it left. Using the older SSA brass and CCI mag primers with the 90 grain gold dot.

 

[conradwojo]

No expert, but .....

IMR4227 is a awesome powder for my .30 carbine and .410 shotgun loads, which in general means it should really suck in the 6.8. Tried it once just for kicks because of some published loads and will never do that again. I think it was to break in my barrels and that was all I could stand. On the bright side, the bullets did exit the barrel.

 

[Thatguyshm]

IMR4227 is a awesome powder for my .30 carbine and .410 shotgun loads, which in general means it should really suck in the 6.8. Tried it once just for kicks because of some published loads and will never do that again. I think it was to break in my barrels and that was all I could stand. On the bright side, the bullets did exit the barrel.

I found that 4227 worked great in 300 BLK with 155gr Lee hard cast, powder coated bullets.

I was getting around 1900fps with it. I did try imr 4198 in 6.8 and 338 federal. Both were accurate, but the speeds were pretty low.

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[mto7464]

what was your load in the 300 blackout with the 4227?

 

[Thatguyshm]

what was your load in the 300 blackout with the 4227?

17.0

I used the 150gr data. 168gr lists 16.9 as max. I was right at 157 with powder coat and aluminum GC.

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