77 TMK 8208 XBR load dev

[riversidejeep]

https://www.6mmbr.com/223Rem.html This is a pretty nice little info page on .223 stuff and also includes a lot of info on case capacity of different manufacture's of brass.

 

[KyleR1985]

According to quickload:

24.2gr powder Saami .223 specs(28.8H2O capacity), 77tmk, 8208xbr, 2.26” COAL: 80.5kpsi 2844fps in a 16” barrel.

Everything the same, except my LC fired/sized brass with 30.5gr water capacity, and 2.45” COAL: 58kpsi and 2644fps in a 16” barrel.



The wildly different results above mirror my results live with other powders. You can’t trust internet strangers load data (hot or mild) without every single variable accounted for.


Especially when the case capacity of the cartridge being discussed is so small.

 

[wind gypsy]

Just getting up to speed with reloading on a new dillon 550. Loaded up 15 with lapua brass, cci 450, 75 ELDm, 23.0 gr XBR dropped from the measure on the press and it put 15 rounds under MOA with 15 FPS SD. 2770 FPS avg in 18" wylde tikka. Load dev done

Worth noting that 23.0 gr XBR is less than what most people discuss here and that the velocity is pretty solid for an 18" barrel IMO. I thought this ACE barrel with the wylde chamber would take more powder than standard SAAMI chamber but this tube seems to build pressure/velocity quite fast and takes less powder than the factory tikka barrel it replaced.

 

[TheDoublR]

Nice! I'm testing 8208 and 77 tmks myself, but out of an AR with 20" bull barrel. Hoping to see some good results.

I am in the same setup and just about to start working on a load. Care to share what worked for you.
Im 1:8 twist @BringBackThe80s

 

[Lawnboi]

Just getting up to speed with reloading on a new dillon 550. Loaded up 15 with lapua brass, cci 450, 75 ELDm, 23.0 gr XBR dropped from the measure on the press and it put 15 rounds under MOA with 15 FPS SD. 2760 FPS avg in 18" wylde tikka. Load dev done

Worth noting that 23.0 gr XBR is less than what most people discuss here and that the velocity is pretty solid for an 18" barrel IMO. I thought this ACE barrel with the wylde chamber would take more powder than standard SAAMI chamber but this tube seems to build pressure/velocity quite fast and takes less powder than the factory tikka barrel it replaced.

70-80 I just do 23 of xbr

 

[BringBackThe80s]

I am in the same setup and just about to start working on a load. Care to share what worked for you.
Im 1:8 twist @BringBackThe80s

I haven't worked with it since my previous post, so still only did the initial ladder. (Spent all my bench and range time working up Barnes TTSX loads for this fall in the .243 and .308.) I'll let you know when I get meaningful data.

 

[TheDoublR]

I haven't worked with it since my previous post, so still only did the initial padder. (Spent all my bench and range time working up Barnes TTSX loads for this fall in the .243 and .308.) I'll let you know when I get meaningful data.

Thanks I loaded some this weekend but have not been able to shoot them.
77gr TMK
8208 23.1, 23.3, 23.5
Varget 23.0 23.5 24.0

 

[FLS]

77TMK over 23.5 of 8208 in LC brass with a BR4 primer give me 2803 FPS out of a 24” CTR.
Same load out of a 20” 1-8 Wylde barreled AR gives me 2659 FPS.
All the guys I shoot gas gun matches with that load XBR, are somewhere between 23-23.5 with a 77 grain bullet.

 

[kkp005]

23.0 xbr in Lapua
2.26 OAL
This shot the most consistent In my tikka & Ruger ranch

 

[Fireflyfishing]

Looks good! I need to pick some of that XBR up while it’s on the shelves.

 

[Hydra6]

This is my Go To combo in 223 AI. I very much love this powder. Most suggest TAC. I think XBR is quite a bit more FPS than max charge of TAC. My loads are over yours, but I am AI'd.

I suspect TAC is recommended a lot because 1) it is usually available, 2) flows through a Dillon powder drop well. XBR was impossible to find for a long time

 

[mt terry d]

Load dev done

I've heard that before.
Even said it a few times myself.

 

[FLS]

XBR is about 50-100 FPS slower in all my rifles than TAC. TACs temp sensitivity is way overstated IMO. I imagine it’s mostly regurgitated by folks who have never shot it.
I load the 24.5 grain load on a Dillon 550 and I have shout thousands without issue. I would shoot either powder, depending on what’s available.

77 SMK/ TMK LC brass BR4 Primer:

20 “ 1-8 Wylde chambered AR15
24.0 TAC 2695 SD 10
24.5 TAC 2749 SD 17
24” 1-8 CTR
24.5 TAC 2840 SD 13

 

[wind gypsy]

I suspect TAC is recommended a lot because 1) it is usually available, 2) flows through a Dillon powder drop well. XBR was impossible to find for a long time

3) it's cheap

And like @FLS said, it can get pretty solid velocity.

 

[Fireflyfishing]

Is xbr extruded or ball?

 

[wind gypsy]

Is xbr extruded or ball?

It’s a small/short extruded powder. In my limited experiments it seems to do just as well on the SD front when thrown as ball powders even if the charge weight variance is a bit larger.

 

[KyleR1985]

Early returns on 8208 thrown out of a harrels BR measure for my 6 dasher are good enough for me.

Sometimes it catches and has to cut through powder. When I’ve averaged charge weights with those that catch, and eliminating them, it doesn’t change the precision really.

I’m not measuring below .1gr though. If you’re doing long range precision stuff, I imagine it starts to matter.

.223 work I think its a great option if the velocity is good enough for you.

 

[FLS]

Is xbr extruded or ball?

8208 looks like short cut H4895.

 

[Fireflyfishing]

It’s a small/short extruded powder. In my limited experiments it seems to do just as well on the SD front when thrown as ball powders even if the charge weight variance is a bit larger.

8208 looks like short cut H4895.

Thanks fellas. Sounds like it works ok in a Dillon press. That’s where I’d be loading from.

 

[Hydra6]

DAA .223 Fast-Flow Powder Funnel

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I bought a couple of these to try on my Dillons for loading 223. Been using the OEM Dillon powder funnel.