Sierra 153 TMK Load Data

[Firestone]

I had full intentions to test all the new TMK’s and was honestly pretty excited to do so. But after seeing the bullet quality and how the 107’s & 116’s shot vs. Berger’s, I scrapped the whole idea. Wasted enough time and money on the 6mm stuff.

I have around 450 of them left over

 

[Meller18]

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.

View attachment 1044608

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.
View attachment 1044609

How are you getting up to 57 58 gr of powder?

 

[Treelineasassin]

How are you getting up to 57 58 gr of powder?

Running in excess of saami max anticipated pressure of course

 

[david2duck]

I set my scale to 57gr and when it hits 57gr I pull it and dump it in the case.

All jokes aside a quick google search for 150-156gr bullets will show you up to 58/59gr of n565. I loaded for 3 diff 6.5PRC’s and 156gr Berger’s and all of the were 57-58grs of 565.