New TMK announced

[nm.otter]

That 107 is an aggressive design for sure.

Left to Right:
107 TMK
108 ELDM
109 ELDM

Informative -- thank you.

I suspect the #397139 (109/110gr) seating stem might be a good fit for these.

 

[huntnful]

Informative -- thank you.

I suspect the #397139 (109/110gr) seating stem might be a good fit for these.

I have a forster ultra seater in 6CM and it left no marks.

 

[Ckat]

Anxious for multiple accuracy reports on the 107s. They look really intriguing…

 

[jonnyviceroy]

Anxious for multiple accuracy reports on the 107s. They look really intriguing…

Here was my (cherry picked best of course) of my 7 shot groups. 16.5” 6 creed. Shot three 7 shot groups and had seen enough to know the bullet works real well. Largest group was .85

 

[Bluefish]

Has anyone seen any load data from sierra on these? Can’t seem to find anything. Looking for 6 creedmoor and 107’s.

I was going to start with 108 data then match the ogive location or mag length whichever is longer since the 107 looks to have the ogive pushed back a little compared to the 108’s. Should allow a touch more powder or less pressure.

 

[Bluumoon]

View attachment 1029615
Here was my (cherry picked best of course) of my 7 shot groups. 16.5” 6 creed. Shot three 7 shot groups and had seen enough to know the bullet works real well. Largest group was .85

Nice!

COAL?

 

[jonnyviceroy]

Nice!

COAL?

2.800 COAL. Always been a big jump guy with TMKs and eldms.

 

[Fartrell Cluggins]

I’m excited at the prospect of the 133-135 grain .257 TMK.

What are you going to shoot it out of?

 

[Q_Sertorius]

What are you going to shoot it out of?

A 1-8” twist .25-06.

 

[2Stamp]

A 1-8” twist .25-06.

I should really put a fast twist on my 25-06. . But it's a browning so...

 

[wind gypsy]

That 107 is an aggressive design for sure.

Left to Right:
105 HYB
109 LRHT
107 TMK
108 ELDM
109 ELDM

View attachment 1029511
View attachment 1029513

Shortest BTO and it also looks like the longest boat tail. Must be the shortest bearing surface by a fair margin.. Almost wish they were a bit less aggressive on the design but i guess we'll see how finicky they are/aren't with time.

 

[Formidilosus]

Shortest BTO and it also looks like the longest boat tail. Must be the shortest bearing surface by a fair margin.. Almost wish they were a bit less aggressive on the design but i guess we'll see how finicky they are/aren't with time.

They haven’t been finicky at all. 2x 18” 6cm, 16” 243win, 20” 6XC, 16” 6XC, and an 18” 6x45. First load tried in all were right there with the guns normal groups.

 

[Schmo]

@Formidilosus,
Is there any real reason, besides a BC gain, to use the 116 over the 107 for general western hunting?

 

[Formidilosus]

@Formidilosus,
Is there any real reason, besides a BC gain, to use the 116 over the 107 for general western hunting?

Penetration seems to be deeper, and seems to result in larger wounds for longer depth. But the 107gr penetrates plenty deep, and creates good wounds.

 

[sickles107]

@Formidilosus,
Is there any real reason, besides a BC gain, to use the 116 over the 107 for general western hunting?

I would be curious to see max "terminal range" between 107 and 116 coming from 16" and 18" kreedmores, modest charge of h4350.

What distance would the bc increase make up for lower muzzle velocity on the 116, etc

 

[Formidilosus]

I would be curious to see max "terminal range" between 107 and 116 coming from 16" and 18" kreedmores, modest charge of h4350.

What distance would the bc increase make up for lower muzzle velocity on the 116, etc

It’s functionally equivalent.

 

[Bluumoon]

I would be curious to see max "terminal range" between 107 and 116 coming from 16" and 18" kreedmores, modest charge of h4350.

What distance would the bc increase make up for lower muzzle velocity on the 116, etc

18” At my elevation (7000) estimated 2900 fps on 107s and 2800 on 116 they both hit 1800 fps around 825 yards.

 

[nm.otter]

Any windage advantage?

 

[Bluumoon]

Any windage advantage?

8mph to 10mph iirc

 

[Shraggs]

8mph to 10mph iirc

If you don’t mind, I was taught that basically those would both be +/- 6 mph loads if speed was in the 2850 range. I believe I noticed a prior similar post on a higher mph then the g1 bc.

Could you explain for me?