153 TMK Load Data

[david2duck]

Thought I’d start a thread for the 153’s now that all the new TMK’s are starting to show up.


Seekins Element Hunter w/Airlock ZG6.5
6.5PRC
Brass: ADG (new)
Primer: Fed 210m
COAL: 3.000
Powder: N565
56.5: 2708fps
57.0: 2746fps
57.5: 2772fps
58.0: 2810fps
58.5:2826fps
I had zero signs of pressure throughout.



I’m going to load up 10 at 58gr and see how they shoot. The 3 PRC’s I’ve loaded for in the past were 57-58gr’s of N565 with the Berger 156’s.

This is 5 @ 58gr of N565 with the Berger 156’s I had loaded for another rifle. They averaged 2776 with an ES of 19.1 and an SD of 6.8.

 

[Tdonat]

Here’s my load:
22” benchmark barrel
6.5 PRC
153 TMK
ADG brass
fed GM215M
56.5G H1000
C.O.A.L 2.950
2907 fps
Es:14.2-for 5 shots
As: 5.5-for 5 shots

 

[NWBLKTAIL]

View attachment 1044724
Here’s my load:
22” benchmark barrel
6.5 PRC
ADG brass
fed GM215M
56.5G H1000
C.O.A.L 2.950
2907 fps
Es:14.2-for 5 shots
As: 5.5-for 5 shots
View attachment 1044725

What bullet?

Edit: nvm thought I was in a different thread lol

 

[Chopper36x]

Not going to lie loaded up some of these this weekend. The amount of bearing surface and shape of these has me severely disappointed. I really hope the 25,7mm,30 cal look much better like the 6mm do. I don’t even think I’m going to waste my time with doing a load work up at this point.

 

[43.6N]

Not going to lie loaded up some of these this weekend. The amount of bearing surface and shape of these has me severely disappointed. I really hope the 25,7mm,30 cal look much better like the 6mm do. I don’t even think I’m going to waste my time with doing a load work up at this point. View attachment 1044939

I’m genuinely curious. What were you hoping to see? I’d have a hard time writing off a bullet before seeing how it shoots just based on how it looks.

 

[Chopper36x]

I’m genuinely curious. What were you hoping to see? I’d have a hard time writing off a bullet before seeing how it shoots just based on how it looks.

Well with how much bearing surface that bullet has and the way it’s sitting in the case already. I can say it’s going to need a special reamer and have issues. I’m pretty big on trying to run freebores to get the bullet as far out of the case and up into the neck as possible. The amount of bearing surface and short stubby noise on it just isn’t looking good. After shooting enough bullets, reamer, cartridge combos you start to notice things. I was really looking for the 150 smk with the 6mm size ballistic tip in it. This looks to be the same size tip that’s in the 30 cal bullets. That’s good for expansion but all the other stuff fighting this bullet isn’t looking good to me. This is just my thoughts and I was super excited for these new bullets. I’ve been running the 30 cal 195, 7mm 160 gr, 77 tmk for years and love them. The new 6mm look great too, this one just falls flat for me. I might spec out a new reamer for the 6.5 prc in a medium action for this to work. But that’s a lot of work for a bullet that’s just kinda meh.