Sierra 116 TMK Load Data

[Gstew1930]

Gotcha

Right? If you cut the carcass in half with the skin still on that makes it easier to pack out whole.

No packing out where I hunt lol. Drive the side by side up to & throw it in. Not much sport to it. Ill shoot TF out of pigs with this load though

 

[Jhunts]

Anxiously awaiting my Tikka 6 creed from UM. To pass the time I have been reading all the posts and now Sierra’s load data. When it arrives, I think I will chop it to 18” and from what others are posting, it should be getting 2750fps with the 116 TMK at max load. Has anyone chopped one yet?

 

[AZ Gator]

Anxiously awaiting my Tikka 6 creed from UM. To pass the time I have been reading all the posts and now Sierra’s load data. When it arrives, I think I will chop it to 18” and from what others are posting, it should be getting 2750fps with the 116 TMK at max load. Has anyone chopped one yet?

I’m getting 2708 with H4350 out of a 16” PBB, 7.5 tw.

I could push it a bit harder, as I don’t have any pressure signs even in 95 degree conditions, but I prefer the better safety margin.

 

[Jhunts]

Another question to those with Tikka actions,

I’m getting 2708 with H4350 out of a 16” PBB, 7.5 tw.

I could push it a bit harder, as I don’t have any pressure signs even in 95 degree conditions, but I prefer the better safety margin.

Thanks for the fast reply, that’s great news. I’ve considered going to 16.5” but am a bit nervous if the factory barrel is slower. Once it is shot out, I plan to go PBB.

 

[806guns]

6-284 .150 freebore Manson reamer
Crb hunter
24" 7.5 twist
Will have some load data this weekend

 

[Jhunts]

For those using Tikka actions for 6CM with the m+ mags, have you found increased accuracy loading these bullets out to a COL 2.90”? Sierra data uses 2.78”. My other Tikkas have long jumps to the factory barrel rifling.

 

[NoDakhunter]

For those using Tikka actions for 6CM with the m+ mags, have you found increased accuracy loading these bullets out to a COL 2.90”? Sierra data uses 2.78”. My other Tikkas have long jumps to the factory barrel rifling.

I had no accuracy difference between a .030 and .090 jump. Both shot great. I believe I was at 2.88” and 2.82”

 

[coya]

For those using Tikka actions for 6CM with the m+ mags, have you found increased accuracy loading these bullets out to a COL 2.90”? Sierra data uses 2.78”. My other Tikkas have long jumps to the factory barrel rifling.

2.850 was the happy place for mine

 

[Jhunts]

2.850 was the happy place for mine

Sounds like anything between 2.82 and 2.88 is going to work well. Thanks @NoDakhunter and @coya. Off to the reloading room! 2.850 seems like a good compromise.

 

[Willie IV]

Sounds like anything between 2.82 and 2.88 is going to work well. Thanks @NoDakhunter and @coya. Off to the reloading room! 2.850 seems like a good compromise.

2.85 here too! From what I can tell they're not very picky.

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[Jhunts]

Since I’m new to the 6 CM, do many of you choose the N555 powder over H4350 for the 116 and for that matter the 108 eldm? From what I see in the Sierra load data, it could be faster at lower pressure. Most of the data on this thread seems to be H4350 as the gold standard.

 

[Jmedin]

Since I’m new to the 6 CM, do many of you choose the N555 powder over H4350 for the 116 and for that matter the 108 eldm? From what I see in the Sierra load data, it could be faster at lower pressure. Most of the data on this thread seems to be H4350 as the gold standard.

Try H1000 46.0 gave me good groups and speed

 

[mtnbound]

Since I’m new to the 6 CM, do many of you choose the N555 powder over H4350 for the 116 and for that matter the 108 eldm? From what I see in the Sierra load data, it could be faster at lower pressure. Most of the data on this thread seems to be H4350 as the gold standard.

Typically N555 is my preferred choice but my choice doesn’t matter it’s what works best during load development and with the 116s H4350 was the winner.

 

[806guns]

6-284 .150 free bore
24" 7.5 twist
Shooting some 116 tmk and 120 bergers


116 TMK
53.5 Retumbo
Avg 3068
Es 19
Sd 8
120 Berger
53.5 Retumbo
Avg 3089
Es 25
Sd 10

54gr was max for me this will work.

 

[PC356]

116 TMK, 18” PBB 6mm NSI (PRC) 7.5 twist barreled Tikka T3X. Virgin ADG 6.5 PRC brass necked down with a SAC .268 bushing and a .241 mandrel. Trimmed to 2.015”. 2.940” COAL and 2.300” CBTO. Don’t know how far off lands I am. Just Sharpied until I was out of em. Comparator shows shoulders on all 50 pieces of virgin brass at 1.642” and 25 once fire formed pieces at ~1.644”. Can’t find even slightest hint of ejector mark. CCI 250 primer and 57.5 gr H1000. First time I’ve ever necked any brass down, assuming that may contribute to the high ES. Hopefully FF’d brass can cut that in half..? West TX DA of around 2800 ft.

 

[bwill6]

Howa Mini 6mm ARC
7.5 twist 22 inch barrel
Hornady 4x fired brass
Magtech 7.5 Small Rifle Primers
COAL = 2.372"
5000 ft elevation
75 degrees F

29.5 gr StaBall Match
2579 fps
Group size: 1.04"
Mean radius: .42"

28.5 CFE 223
No velocity data
Group size: 0.92"
Mean radius: .38"
Slightly heavy bolt lift and some ejector smear

29.5 gr Leverevolution
No velocity data
Group size: .99"
Mean radius: .38"
Slightly heavy bolt lift and some ejector smear

This is a real promising start. I'll stick with StaBall since it's been extremely temp stable for me in the past. That load gives me 2000 fps out past 500 yards at the elevation I hunt. I'm looking forward to using it this winter on a cow elk.

 

[Chanimal]

6 Creed
20” Hells Canyon 7.5T
COAL: 2.800
Alpha LRP Brass
42.0 N555

6500’ 65deg

 

[MCGHeel]

6 Creed
20” Hells Canyon 7.5T
COAL: 2.800
Alpha LRP Brass
42.0 N555

6500’ 65deg

I think you need to run a seating depth ladder and find a better node. Way too much vertical stringing there.


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[AkMtnRunner]

I am wrapping up load development for my 6 GT, at least I am calling it good for now.

In short, I've spent a lot of time and components to show that just about anything shoots plenty well enough. I've been having a limiting my wobble zone to just 1/2-3/4 MOA. Maybe I should have a more solid rest to do this load development, but I am also trying to put pressure on my own stabilizing ability with field gear.

Interestingly, I've found RL17 to be just about as accurate as Varget and RL16 with just as good ES/SD (ES are in the 10-15 range for each of these for 5 shot groups of each charge weight), and giving about 100 fps more velocity between their optimal charges. I have a good supply of RL17 so I think I'll be going ahead with that. The higher temperature sensitivity of the 17 doesn't concern me either as all of my shooting and hunting happens within about 25 degrees and I am shooting beyond 600 yards. The accuracy purest in me wants to go to the RL16, but I've only got less than 1 lb of that and I don't think the difference is significant.

The barrel is a prefit by Osprey from Patriot Valley, 20", .75" straight taper, 7 twist. I am using CBTO 1.982. Again, this is a 6 GT.

Varget
Best charges:
33.3: 2674 avg
33.6: 2693 avg
Total 10-shot composite group size 0.95"

RL16
Best charges:
36.0: 2668 avg
36.3: 2684 avg
Total 10-shot composite group size 0.85"

RL17
Best charges:
36.1: 2773 avg
36.4: 2796 avg
Total 10-shot composite group size 1.0"

Staball 6.5
Best charges:
37.4: 2684 avg
37.7: 2708 avg
Total 10-shot composite group size 0.85"
* I was getting signs of being significantly overpressure beginning at 37.7.

H4350
Best charges:
36.7: 2720
37.0: 2780
Total 10-shot composite group size 1.2"
*ES's were bad and I was getting erratic pressure signs.

I've been using GRT along the way to help narrow down the testing ranges. As a bonus for the RL17, GRT thinks peak pressure is actually only around 57-58k with my most accurate charges. I did go up to 37.6 gr with RL17 to get 2885 fps and was probably still in the 65k range.