Sierra Heavy TMK 6MM Testing

[Robobiss]

Just an FYI for those who are interested in more than just the 116. I know this is the new 6mm bullet thread, but the 153 .264 TMK is also in stock on Sierra. I have a box headed my way to test in a 6.5x55

 

[schmidty3]

I got the 153s and 116s. Just lacking the 134s

 

[JM151]

116 back in stock

 

[coya]

I emailed Sierra to see if they had load data for the 116 in 6creed and they replied:
"No data yet. We start running the bullet in April."

 

[43.6N]

I emailed Sierra to see if they had load data for the 116 in 6creed and they replied:
"No data yet. We start running the bullet in April."

come down a grain from the 107 H4350 load data. I’d bet money that’s where sierras published data ends up when they get done testing.

 

[coya]

come down a grain from the 107 H4350 load data. I’d bet money that’s where sierras published data ends up when they get done testing.

Where would you place your bet for COAL?

 

[Lawnboi]

I’m curious how long the 116 compares to the 107.

 

[43.6N]

Where would you place your bet for COAL?

Like what Sierra is most likely to publish?
They listed the 110 at 2.8750” COAL for the 6mm Creedmoor.
That’s a pretty safe bet for the 116.

Hodgedon, Berger, and Vhitavuori all listed 2.79 or 2.8 as their book max lengths for 115 VLDs.

Me personally, I would make a dummy cartridge of your chamber once you have the 116TMK in hand. Then seat 20-30/1000ths short of your measured length.

If your lands are still miles away, I’d just make sure the transition amgle from bearing surface to boat-tail lines up with the neck-shoulder junction.