Sierra Heavy TMK 6MM Testing

[justin davis]

If it works why change, im sticking to the 107s in my 243.

Because it’s fun to tinker with different bullets for me.

 

[5MilesBack]

It's the "what's on the other side of that ridge" mentality. You just have to know. So you do what it takes to find out. And who knows......perhaps the 116's will shoot .250" groups.....LOL.

 

[Nine Banger]

It's the "what's on the other side of that ridge" mentality. You just have to know. So you do what it takes to find out. And who knows......perhaps the 116's will shoot .250" groups.....LOL.

Let's all just "wait and see" what happens.

All of us...and see...what happens.

 

[Matt5266]

If it works why change, im sticking to the 107s in my 243.

Lol you obviously just did the same thing with the 107s since they just were released before the 116s. So I assume you had something that "worked" before those but you changed....

 

[Hurley88]

Would love to see where you hit pressure using a 116 with 4350 and sc in a 243

Yeah sure, next time out I’ll bring some.
I’m thinking it tops out at or before 41.5 & 44.5

And the 243 is 1:8 instead of the 1:7.5 of my 6CM so that’s something too.

 

[Pistolpete28]

Lol you obviously just did the same thing with the 107s since they just were released before the 116s. So I assume you had something that "worked" before those but you changed....

Not really just got this 243, when the 107s were released. I built a load with the 108 Eldm and the 107 tmk at the same time roughly.

 

[Pistolpete28]

Because it’s fun to tinker with different bullets for me.

Yeah it’s definitely fun! I don’t fault anyone for tinkering, if I had a 6 prc or 6 um the 116 tmk would be a no brainer for me. I’m sure it will also do well in the 6 creed/243.

 

[Hurley88]

Eh, the 243/6CM is like the dividing line with the 107/116. Can go either way depending on velocity. But the 116 will likely do better with quick drops, I’d bet at around 2625fps you have the same correction factor across the widest distance at the the widest range of different atmospherics. If you’re doing that, why not take the deeper penetration and edge in BC?

But if you’re like me and most of your 6mm cartridges are below that, maybe go the other way.

 

[justin davis]

Yeah it’s definitely fun! I don’t fault anyone for tinkering, if I had a 6 prc or 6 um the 116 tmk would be a no brainer for me. I’m sure it will also do well in the 6 creed/243.

Yea I usually shoot the 108 Berger EH but gonna test these 116 out

 

[AZ Gator]

Ordered some 116 gr tmks and a 7.5 twist 6mm barrel to be chambered in 6cm. Trying to gather some data here on length to cut it at if I want to be comfortable on velocity to 650 yards. Expansion velocity similar on these to eldms at 1800?

My calculation is showing my DA at about 1200 feet right now. My 107’s out of a 16” 6CM hit 1800 at 730 yards.

I haven’t received 116’s yet to know their velocity out of my barrel. I’m think 107’s will end up with greater range due to starting at a higher velocity.

 

[TheM1DoesMyTalking]

My calculation is showing my DA at about 1200 feet right now. My 107’s out of a 16” 6CM hit 1800 at 730 yards.

I haven’t received 116’s yet to know their velocity out of my barrel. I’m think 107’s will end up with greater range due to starting at a higher velocity.

What's your MV and load (if you're willing to share) with the 107's? I'm at a similar DA and also debating 16" vs 18".

 

[ImperialBull]

When I ordered the email said it was awaiting payment at first then the payment came out the day after but no email about shipping confirmation.

My confirmation said the same, other than no email at all. Wondering if shipment date had anything to do with 500 count vs 100. I ordered 500 on the 15th, but on the 2nd go when they came back into stock a few moments after they went out of stock the first time briefly.

 

[hickswr]

View attachment 1039814

From left to right:
107 TMK, 116 TMK, 112 MB, 109 ELDM, 108 ELDM, 103 ELD-X

Man you need some yellow box boolets

 

[BearGuy]

My confirmation said the same, other than no email at all. Wondering if shipment date had anything to do with 500 count vs 100. I ordered 500 on the 15th, but on the 2nd go when they came back into stock a few moments after they went out of stock the first time briefly.

Exact same for me

 

[WoolyBugger]

My calculation is showing my DA at about 1200 feet right now. My 107’s out of a 16” 6CM hit 1800 at 730 yards.

I haven’t received 116’s yet to know their velocity out of my barrel. I’m think 107’s will end up with greater range due to starting at a higher velocity.

So is 1800 still the upset velocity we’re shooting for? I’m pretty set on 18-20” range, seems like I have nothing to worry about at that length

 

[IrkedCitizen]

Form said he had great results down to 1,717fps on his cull hunt

 

[coya]

116 tmk- 6creed 20 in barrel.
Imr4350 40.6gr
2.850
2863fps
For comparison, the 107 tmk shot a 1.5 inch group. I'm thinking I'll lower the charge a grain bc I'm chasing quick drop

 

[Treelineasassin]

107s from a 22in 6arc, 29.5gr AA2520 runs 2720mv. 5 shot groups sub moa. Same load with 107smk is running 2690mv, and also shoots very well. This is a bolt gun, throated out 0.040 longer than saami spec.

Have a few 6cm rifles I'll be testing the 107s and 116s in.

Just received the 153s as well, they have a very long bearing surface, 50k longer than a 156 berger. They will build pressure quickly.

 

[AZ Gator]

So is 1800 still the upset velocity we’re shooting for? I’m pretty set on 18-20” range, seems like I have nothing to worry about at that length

I haven’t heard any reason to expect the new TMKs to be any different than the existing ones. My plan is to make 1800 the minimum.