Well, I'm officially out of IMR 8208 XBR. Apparently, it is being hidden behind all of the bottles of RL26. I need to load up a bunch of 223 ammo with Sierra 77 grain TMKs as I'm down to the nitty gritty of loaded rounds. I would like some suggestions of your preferred alternative choices. I'm more focused on accuracy than speed; but, all else being equal, I'll obviously take both. Temperature non-sensitivity is a plus as here in Montana I am shooting in temperatures from 20 below zero up to 100 degrees.

I've researched it and come to some conclusions but would like input from others based on their experiences. What's a good alternative choice? I've got a couple of pounds of each TAC, X-terminator and CFE223. Based on what I've read, I think I've eliminated CFE223 for the temp instability. I base that on nothing other than what I've read. For those who need this information, these will be shot in a couple of Tikka 223s with 1 in 8 twist barrels.

For what you have, I would start with TAC. If you can get some, AR-Comp would be one to try.

23.6gr TAC

LVR

N140

That's what I use as well.

TAC

This one has intrigued me as I have heard/read that it works, even though it was not "intended" as a .223 powder (I think). I've also seen it available, occasionally, locally.

TAC when loading on the 550, Varget when taking my time.

That's what I'm using. Temp stable & has a decoppering agents.

I run 22.6gr of X-terminator, as well as AR Comp:



Load #2 again to confirm:

20.5 gr AR Comp. Not a speed demon, but sub moa for 10 shots in an AR and bolt rifle. Also tested this load in one of my bolt guns and it shot well, but had to bump the charge weight up for best precision in the Savage predator:


Avg velocity through the 22" barrel was 2,680 fps at slightly above book max..^^

Interesting that Nosler shows about 2gr more for the H4895 max when compared to Sierra.

Thanks for the info. As stated above, I do have x-terminator on hand. However, my Sierra app does not have it listed as a powder and I see by the page you posted from the manual they don't list it there either. Are you able to elaborate a little more as to how it performed for you? Thanks in advance.

Any pressure signs Jason? Did you chrono the load? I ask because your load appears to be above the max in my Sierra App, the Sierra page posted by bsa above and the Ramshot data. Thanks in advance.

Good question. Here is some more data from Western powders. I like to use it, when I'm using Ramshot powders. You can see where I highlighted some of the load data that I tried:


Since I mainly load for my AR's with 556 chambers, I also looked at the 556 data and worked up to max:


Check out my notes about TAC. It was crap as far as I am concerned. The reason I don't highly suggest it.. There's better (much better) powders out there. This was back when I was running low on AR Comp. I was trying other powders in my rifles and was quite surprised by X-terminator. I also tried some TMK's with that powder through my Noveske with BUIS:


And the BCM with 77SMK and X-terminator:


That BCM has been my problem child for sure. I had all but given up on it, until I started messing with X-terminator in it. That 22.6 gr charge is stiff. Running close to max, but I did try 23 gr's as well. That is the 1.364" group on the right on that target. According to my notes, 23.7gr was too stiff and over max as far as I am concerned.

I've got lots of 8208xbr if you make it to east idaho I could spare at least a pound. I like 8208xbr so much I hate to see people have to use something else.

Bb

The Sierra page is for .223 loads, 5.56 based loads (I believe) max out around 24.5-24.8gr TAC. I can't remember my velocities, but I *think* they were around 2750 out of a 16" barrel. All of mine were loaded in PMC cases with Wolf primers.

TAC, Re-15, Varget, H4895.

Varget if you're looking for accuracy. Its available at Powder Valley right now.

Thanks for everybody's input so far. I found a load using TAC that my rifle really likes so I'll stick with that until I can once again find some 8208XBR. By the way, thanks for the gesture Burleyboy.

I wuz gunna say TAC too but never mind.

Another vote for TAC.

5rds TAC, Sierra 77grn OTM, 18" WOA barrel with matched bolt, FL sized PMC brass on a Dillon 550 @100:



3 rds of the same at 307 on my Swinger. The 3rd rd broke the bolt head:

Chuck, what velocity are you running those at with TAC? Trying to decide how far to push the load.