Sierra 88 TMK Load Data

[pods8 (Rugged Stitching)]

Shot some more 88’s today in the standard 8twist tikka 223 barrel, they continue to shoot well. Same load I’ve been using with H4895.

What COAL you at? Is yours standard throat or did it get throated longer?

Playing catch up here but 77s in my chamber as stuffed into the case, didn't know if these 88s have a profile that sits out longer?

 

[NWBLKTAIL]

What COAL you at? Is yours standard throat or did it get throated longer?

Playing catch up here but 77s in my chamber as stuffed into the case, didn't know if these 88s have a profile that sits out longer?

Standard throat, nothing “optimal” about this setup.

COAL 2.460” puts me about .015–.020 off touch

They are stuffed deep into the case but I’m 200 bullets into this and they are really consistent

 

[pods8 (Rugged Stitching)]

Standard throat, nothing “optimal” about this setup.

COAL 2.460” puts me about .015–.020 off touch

They are stuffed deep into the case but I’m 200 bullets into this and they are really consistent

Did you try 77s prior in your chamber? Curious if your throat is similarly short but the 88s just are more elongated. 77s in mine need to be seated pretty close to sammi to fit my throat.

 

[NWBLKTAIL]

Did you try 77s prior in your chamber? Curious if your throat is similarly short but the 88s just are more elongated. 77s in mine need to be seated pretty close to sammi to fit my throat.

No iirc 2.330 was touch with 77’s in my chamber. Shot about 300 of those.

 

[BLJ]

No iirc 2.330 was touch with 77’s in my chamber. Shot about 300 of those.

So you went from 2.33 with 77’s to 2.46 with the 88’s just from bullet shape?

 

[NWBLKTAIL]

So you went from 2.33 with 77’s to 2.46 with the 88’s just from bullet shape?

Si senor, 88 is a long bullet

 

[BLJ]

Si senor, 88 is a long bullet

Confirmed as such.

Thank you.

 

[pods8 (Rugged Stitching)]

No iirc 2.330 was touch with 77’s in my chamber. Shot about 300 of those.

Noted, I got a shorty throat in comparison.

 

[justin davis]

Got some N555 and N560 loaded up to test for my new 22cm with 88tmks. Have high hopes for the 560.

How did the N560 do?

 

[WDR]

Si senor, 88 is a long bullet

Yes, its much more "VLD" shaped than the 77.

I haven't been able to test my loads in my 7 twist 20" Savage .223 with more than 22gr of N540, but that got me to 2500 with no pressure signs using LC brass and CCI BR4s. I'm around 2.40" with the 88s. I'm hoping to break 2600, but not sure if its worth the trouble over just loading 77s or the 80 ELDm's that killed deer and elk fine last year. VV 88 ELD data says its maybe possible with N540.

The 88 TMK has me almost temped to AI this thing. Silk purse from a sows ear, but it could be fun. Would kinda like to see more terminal data/reports, but I suspect it will work just as well as the 77 does.

 

[NWBLKTAIL]

Yes, its much more "VLD" shaped than the 77.

I haven't been able to test my loads in my 7 twist 20" Savage .223 with more than 22gr of N540, but that got me to 2500 with no pressure signs using LC brass and CCI BR4s. I'm around 2.40" with the 88s. I'm hoping to break 2600, but not sure if its worth the trouble over just loading 77s or the 80 ELDm's that killed deer and elk fine last year. VV 88 ELD data says its maybe possible with N540.

The 88 TMK has me almost temped to AI this thing. Silk purse from a sows ear, but it could be fun. Would kinda like to see more terminal data/reports, but I suspect it will work just as well as the 77 does.

I’m 2720fps in a 22”, I’d try H4895, TAC, or XBR. I’ve never used N540 but may run out of room in the case before your so compressed it messes with seating depth.

I think 2600 is reasonable for 20”. Though it seems your throat is a bit shorter so not sure.

In tempted daily to get a 7twist with .100 extra freebore