Sierra 88 TMK Load Data

[Nine Banger]

Rocking out with the 14.5" Quick Drop load.

42.5 gr H4381sc 2.680” 88TMK 22 Creed PVA 1:7 14.5” bbl 2750 fps

 

[Moose83]

Another 8 twist factory tikka .223 success so far. 25gr lvr, lc brass, rem 7 1/2 br primers. 1.3" for 10 at 100yds. 2588 Avg velocity according to my cheap chrono. Would post a pic of my group but my phone won't let me for some reason. Gonna load some more and test at 4-500yds to see if they stay stable. If they do then I'm gonna definitely run one though a black bear and see what they do. Has anyone tried 8208 xbr with these in a plain .223?

 

[NWBLKTAIL]

Another 8 twist factory tikka .223 success so far. 25gr lvr, lc brass, rem 7 1/2 br primers. 1.3" for 10 at 100yds. 2588 Avg velocity according to my cheap chrono. Would post a pic of my group but my phone won't let me for some reason. Gonna load some more and test at 4-500yds to see if they stay stable. If they do then I'm gonna definitely run one though a black bear and see what they do. Has anyone tried 8208 xbr with these in a plain .223?

Barrel length?

 

[Moose83]

Barrel length?

20"

 

[Dude270]

I finally got around to trying 88s in my factory howa mini chambered in 22 ARC.

1x hornady brass
Rem 7 1/2s
29.0 gr of Lever
88 tmk seated at 2.30 COAL (about 40 thousandths off the lands)

2830 fps with a 5 shot group that measures .631"

It looks pretty warm, but not hot.

 

[NWBLKTAIL]

I finally got around to trying 88s in my factory howa mini.

1x hornady brass
Rem 7 1/2s
29.0 gr of Lever
88 tmk seated at 2.30 COAL (about 40 thousandths off the lands)

2830 fps with a 5 shot group that measures .631"

It looks pretty warm, but not hot.

Assuming it’s an ARC if using 29gr of lever

 

[Dude270]

Assuming it’s an ARC if using 29gr of lever

It is. I added that to my post to clear up any confusion.

 

[FB Trout]

Another 8 twist factory tikka .223 success so far. 25gr lvr, lc brass, rem 7 1/2 br primers. 1.3" for 10 at 100yds. 2588 Avg velocity according to my cheap chrono. Would post a pic of my group but my phone won't let me for some reason. Gonna load some more and test at 4-500yds to see if they stay stable. If they do then I'm gonna definitely run one though a black bear and see what they do. Has anyone tried 8208 xbr with these in a plain .223?

Yes, I have. 23.6 grains of 8208 in factory 1:8 Tikka 16" and 18”. Stable at my DA and 1.5ish" 10 shot groups.

 

[Big_wals]

Yes, I have. 23.6 grains of 8208 in factory 1:8 Tikka 16" and 20". Stable at my DA and 1.5ish" 10 shot groups.

What were you getting for velocity? When my 88s get here I plan on starting at 23 grains of XBR.

 

[sierracharlie338]

Another 8 twist factory tikka .223 success so far. 25gr lvr, lc brass, rem 7 1/2 br primers. 1.3" for 10 at 100yds. 2588 Avg velocity according to my cheap chrono. Would post a pic of my group but my phone won't let me for some reason. Gonna load some more and test at 4-500yds to see if they stay stable. If they do then I'm gonna definitely run one though a black bear and see what they do. Has anyone tried 8208 xbr with these in a plain .223?

That’s all I shoot out of my 223s. It is very accurate for me. Not super speedy but definitely acceptable. I can report back soon as far as with the 88s, with 69-77 It’s been a great powder.

 

[43.6N]

What were you getting for velocity? When my 88s get here I plan on starting at 23 grains of XBR.

23.0 gr XBR/88TMK was a sweet load for me in the 223.
2685-2700 fps from a 18” barrel.
I shot out to 1120yds during load dev to true bc, and found the g7 pretty accurate.

I was a little hesitant to push faster since 23.5 was my 77gr load. I’ve pierced a few primers pushing high pressure before, and didn’t want any surprises with this load.

 

[Big_wals]

23.0 gr XBR/88TMK was a sweet load for me in the 223.
2685-2700 fps from a 18” barrel.
I shot out to 1120yds during load dev to true bc, and found the g7 pretty accurate.

I was a little hesitant to push faster since 23.5 was my 77gr load. I’ve pierced a few primers pushing high pressure before, and didn’t want any surprises with this load.

Yeah I'm shooting 80 ELDMs over 23.7 gr at around 2700 fps from a 16" barrel. Hoping to get 2650+ with the 88s.

 

[FB Trout]

What were you getting for velocity? When my 88s get here I plan on starting at 23 grains of XBR.

I get 2625 out of a 16” barrel and 2690 in the 18” barrel

 

[NWBLKTAIL]

23.0 gr XBR/88TMK was a sweet load for me in the 223.
2685-2700 fps from a 18” barrel.
I shot out to 1120yds during load dev to true bc, and found the g7 pretty accurate.

I was a little hesitant to push faster since 23.5 was my 77gr load. I’ve pierced a few primers pushing high pressure before, and didn’t want any surprises with this load.

23 of XBR in my mind when I was day dreaming different recipes was going to be top end in a standard 223 chamber. Probably more like 22.5gr, but I don’t have the rounds down range to back that theory.

I still have only used Varget and H4895 with 88’s.
I pierced a primer the other day @23gr H4895. Could have been a primer not seated deep enough, but time will tell as I shoot more of them.


It’s just such a small case it seems like even small powder changes really move the needle as far as pressure

 

[43.6N]

23 of XBR in my mind when I was day dreaming different recipes was going to be top end in a standard 223 chamber. Probably more like 22.5gr, but I don’t have the rounds down range to back that theory.

I still have only used Varget and H4895 with 88’s.
I pierced a primer the other day @23gr H4895. Could have been a primer not seated deep enough, but time will tell as I shoot more of them.


It’s just such a small case it seems like even small powder changes really move the needle as far as pressure

Agree 100%

Velocity=Pressure.
Pushing pressure is exciting until you start etching your bolt face from pierced primers.