Sierra Heavy TMK 6MM Testing

[Ryan Avery]

Sierra sent us some 115,116, and 117 to test. We will post the results here. @Formidilosus @PathFinder @Carl Ross

 

[WyldGoose]

 

[PathFinder]

Here are some preliminary measurements and details. All three are very similar. The bearing surface appears nearly identical to the 115 DTAC. The overall nose profile is similar, but the tip elongates it. They are .035"-.040" longer than a 115 DTAC (1.375-1.380). Hopefully that combines to make a Goldilocks bullet that isn't temperamental and gives a small bump in BC over the DTAC.
Cavity depth is a little different between the three, but all of them have a decent sized cavity under the tip. All three have a .110 diameter under the meplat, which matches the 77 TMK and 143 ELD X. These are in good company there.
Each of the three weights exhibit characteristics and dimensions that should be excellent terminally. Whichever of the three becomes the production version will be based on what shoots best on paper and at distance now. Any which way, it looks like Sierra made us what we were hoping for. Pending real world testing, of course.

108 Elite Hunter, 115 DTAC, 115-117 TMK

Loaded in a 243 Improved and 6 UM. Both at 2.940 COAL. 243 Improved will be tested at 48gr H1000. 6 UM will be tested with 64gr H1000 and 66gr N570.

Sent from my Pixel 10 using Tapatalk

 

[mtnbound]

Sierra sent us some 115,116, and 117 to test. We will post the results here. @Formidilosus @PathFinder @Carl Ross

How long will the testing phase last before they go into production?