Sierra 107 TMK Load Data

[Lawnboi]

What’s your COAL with this load?
Which reamer?

I don’t have any loaded right now to measure,but the reamer is an alpha .120 freebore

 

[skierjt]

20" Sammi spec 6 Creed from PBB.
41.5 grains of H4350
COAL of 2.850
2999 FPS

I posted my dads groups with this exact load earlier in this thread. It shot about the same.

What brass?

 

[Tullis94]

What brass?

Alpha LRP, 2x loaded.

 

[15layherb]

6 CM 18” barrel
107 TMK
40gr H4350
Lapua SRP Brass 1x fired
CCI 450
2.800 COAL
2828 fps

 

[Stratos486]

18” 6BR

View attachment 1083580



Bonus 107gr Mtachking-X:

18” 6BR

View attachment 1083580



Bonus 107gr Mtachking-X:
View attachment 1083576

Have you tested the Matchking X on game yet

 

[Formidilosus]

Have you tested the Matchking X on game yet

Not enough to say much other than they upset violently.

 

[Stratos486]

Not enough to say much other than they upset violently.

Thank you.

 

[BLJ]

Not enough to say much other than they upset violently.

Would 1800 FPS apply to these for a minimum expansion velocity?
Or not enough info yet?

 

[Formidilosus]

Would 1800 FPS apply to these for a minimum expansion velocity?
Or not enough info yet?

I can’t say definitively, but testing has shown- and what I’ve seen; I think it could be quite a bit lower than that.

The issue maybe lack of penetration. One gentleman I’m aware of shot quite a few animals with the 142gr 6.5 and they upset very violently he stated.

 

[BLJ]

I can’t say definitively, but testing has shown- and what I’ve seen; I think it could be quite a bit lower than that.

The issue maybe lack of penetration. One gentleman I’m aware of shot quite a few animals with the 140gr 6.5 and they upset very violently he stated.

Coming apart before it gets to where it needs to be?

Thanks.

 

[Formidilosus]

Coming apart before it gets to where it needs to be?

Thanks.

On bigger African plains game with the 142gr MKX- no exits, only one or two made it to the offside hide, several barely damaged the offside lunge. On smaller mains game they all exited and damage was excellent.

 

[Treeman_MG]

Finally got around to spinning an 1:8 twist factory tikka barrel on my t3x, 20". The first 150 rounds were pretty ho-hum, velocity and accuracy wise. Probably 2-3 moa with all loads. Shot 115 bergers terrible, like 5"-6" groups. Shot 107tmks terrible with h1000 and staball 6.5. Had trouble breaking 2800fps with everything except staball 6.5, which produced great velocity, but groups were 3"+.
Like many other 243 users in this thread, I started to see some promise with h4350, and longer c.o.a.l. settled on 40.5 gr h4350, 2.93" coal, CCI 200. Also have a load for 40.5gr imr4831 with everything else the same. The 4831 load is now at 2770fps average, and 1.5-1.8moa for 10 shots. I need to chrono the 4350 load again, as I believe the barrel has now sped up a bit (204 rounds down the pipe). The first test I did with it averaged 2834fps. I think 4350 will have a slight velocity and accuracy edge over the 4831. H4350 is the only power so far to give me 10 shot groups less than 1.5moa (1.25).
I now have an 8lb keg of h4350 ordered, need to get some more tmks now, lol. Also, interestingly, shot a 10 shot group with 107smk's, 40.5 imr4831, 2.88" (jammed) that was just over an inch. The accuracy really began to settle down after about 170 rounds or so.

 

[schmidty3]

Played with a buddys seekins this weekend.

Ladder from 40-41.2 RL 16, composite group .883". 2941-3022


40.7 gr RL16. 5x .942". ~3012 fps. (Mightve been me on the stringing).


2 groups of 5x 109 lrhts and 4x 105 MKs shot a bit tighter.