108 eldm factory tikka 1:8 twist

[Mulyhuntr]

It's been pretty solid. I've gone lapua in other calibers and it seems better in terms of sd.

 

[24valve]

Fast twist Tikka 243, 18" barrel with suppressor.
108 ELDM, 42.0 gr H4350, starline brass
2900 fps

EDIT 2/26/25: This load did fine in dry conditions. However, in true winter conditions during the S2HU Winter Course I had occasional blown primers due to water in the rifle/on the ammo causing pressure spikes. I will be reducing the load by 2 grains to avoid this in the future and maintain the reliability of the rifle.

 

[NWBLKTAIL]

View attachment 813974
Fast twist Tikka 243, 18" barrel with suppressor.
108 ELDM, 42.0 gr H4350, starline brass
2900 fps

I think your done, that’s great. I have a stock on the way and then hopefully I can duplicate that group. 22” tube so maybe a few more fps.

Nice work

 

[bhylton]

View attachment 813974
Fast twist Tikka 243, 18" barrel with suppressor.
108 ELDM, 42.0 gr H4350, starline brass
2900 fps

That’s awesome performance. I’m getting heavy ejector swipe at 40.5gr in virgin PPU brass. Not sure what the speed is, but hoping it settles in after its fire formed. I’m at 16inches otherwise same specs as you

 

[SamsonMan22]

That’s awesome performance. I’m getting heavy ejector swipe at 40.5gr in virgin PPU brass. Not sure what the speed is, but hoping it settles in after its fire formed. I’m at 16inches otherwise same specs as you

I was starting to see a little pressure at 41g of h4350 with virgin perterson brass, it was shooting 1.5moa for 10, 40g was .6moa. I didn’t check velocity yet but I’m assuming I will settle in around 40ish even after it’s fire formed.

 

[Littlechief]

View attachment 813974
Fast twist Tikka 243, 18" barrel with suppressor.
108 ELDM, 42.0 gr H4350, starline brass
2900 fps

That’s some great performance! I think I’m going to switch powders to h4350

 

[bhylton]

I was starting to see a little pressure at 41g of h4350 with virgin perterson brass, it was shooting 1.5moa for 10, 40g was .6moa. I didn’t check velocity yet but I’m assuming I will settle in around 40ish even after it’s fire formed.

Interesting. I see a lot of folks running 41+. I’ve loaded enough to know it’s different for every rifle, but interesting either way. I’m not getting to cute with it until all the brass is once fired and the barrel has 50rds or so.

 

[SamsonMan22]

Interesting. I see a lot of folks running 41+. I’ve loaded enough to know it’s different for every rifle, but interesting either way. I’m not getting to cute with it until all the brass is once fired and the barrel has 50rds or so.

I was expecting to go higher myself, after trying 109s and getting nowhere I just loaded these 2 charges with the 108s to see if they would show any promise. I’m thinking I could safely run the 41g load but I would bet at 41.5 I would start to see a faint swipe, I was starting to see the slightest ejector imprint at 41 in the right light.

 

[SloppyJ]

Little bit different but same projectile, my 18" 6 creed is pushing 108eldms 2960 with a case full of n555 with the accuracy you're looking for.

 

[dirtytough]

Factory Tikka. 108 ELD, H4831sc, Starline.

2980 FPS, 1.1 MOA for 10 rounds.

 

[BlackHillsShooter]

Got surprised a bit today. Right at .020 off the lands, Hornady 108 eldm and 42.1 grains of H4350. Win LRP, Starline brass, once fired.

Gun is a Tikka with an 8 twist. Maybe 200 rounds through it.

I'll back it off to 41.5gn most likely as I know it's accurate there too and check speeds. No pressure signs last time I shot those. Flattened primers with this load.

 

[HighUintas]

@Littlechief , where are you at with the staball now? I'd considered trying it but didn't want to burn the 243 out faster than it will be now.

Here's something interesting from my gun.
22" d18 factory Tikka barrel, throated to seat 108 eldm where boat tail/bearing surface junction is just above the shoulder/neck junction
Cci200
Starline brass
42gr h4350

This load shoots somewhere around 1moa for large round count groups. Great accuracy. I get flattened primers and had seen a few light ejector swipes in 80+ weather, but that was with brass that had already been over pressured and the web was larger, which I think contributed to it. Nothing alarming.

In September, somewhere around 250-300 rounds on the barrel, I had an average velocity of 2985.

At 400 rounds, I measured speed again. 5 loads on the brass. I had been annealing every time, but I didn't with this load. I doubt it made this much difference. Last weekend, I measured it at average of 3040 for 10 rounds. Measured with the $100 Caldwell Chrono. It's always seemed accurate when set up correctly, so I'm confident in my measurements.

 

[Littlechief]

@Littlechief , where are you at with the staball now? I'd considered trying it but didn't want to burn the 243 out faster than it will be now.

Here's something interesting from my gun.
22" d18 factory Tikka barrel, throated to seat 108 eldm where boat tail/bearing surface junction is just above the shoulder/neck junction
Cci200
Starline brass
42gr h4350

This load shoots somewhere around 1moa for large round count groups. Great accuracy. I get flattened primers and had seen a few light ejector swipes in 80+ weather, but that was with brass that had already been over pressured and the web was larger, which I think contributed to it. Nothing alarming.

In September, somewhere around 250-300 rounds on the barrel, I had an average velocity of 2985.

At 400 rounds, I measured speed again. 5 loads on the brass. I had been annealing every time, but I didn't with this load. I doubt it made this much difference. Last weekend, I measured it at average of 3040 for 10 rounds. Measured with the $100 Caldwell Chrono. It's always seemed accurate when set up correctly, so I'm confident in my measurements.
View attachment 830119

Sorry for the late response but I achieved 3050 fps with 45.5 grains of staball 6.5 I’d say it shoots about an 1” to 1-1/4” 10 shot groups so not horrible I think I’m going to give h4350 try

 

[General RE LEE]

Are y’all running into mag length issues with the mag that comes with the rifle?

 

[General RE LEE]

And anyone have a Lite or Superlite cut back and threaded 1/2x28? Running a can adapter?

 

[sierracharlie338]

Factory Tikka. 108 ELD, H4831sc, Starline.

2980 FPS, 1.1 MOA for 10 rounds.

What charge weight are you running?

Are y’all running into mag length issues with the mag that comes with the rifle?

Yes it has been a limitation for my OAL and I plan to go to an M+ mag.

 

[dirtytough]

What charge weight are you running?

I’ll double check after work.

 

[HighUintas]

Standard LA factory mag works fine for the 308 based case. That's what I use in my 243 since I have no m+ mags

 

[ACHILLES]

And anyone have a Lite or Superlite cut back and threaded 1/2x28? Running a can adapter?

I have a t3 lite 243win cut at 16” 1/2x28. Ran a precision armament adapter for a long time but now run the hellfire adapter for my TBac can.

 

[HighUintas]

I have a t3 lite 243win cut at 16” 1/2x28. Ran a precision armament adapter for a long time but now run the hellfire adapter for my TBac can.

What loads and speeds are you getting from your 16"?