New Tikka Tac a1 6.5cm range report

Nice shooting

That is impressive!

Any break in process?

Saw this on FB. Looking good.

So you use Sriracha for CLP?

M1MARTY - What brass did you use? And please, stop embarrassing us.

Very nice.?

Darn good shooting! Sweet rifle and another sharp shooting Tikka.

Is yours really slow? All of them I've seen are. At 41gn my gun only produces 2616fps. The throat on mine is LONG: 140gn ELD seated so that junction of bearing-surface/boattail is even with neck/shoulder junction has the bullet jumping .060". I have to load 43gn H4350 in order to get the same velocity I get from my 42gn load in my .170" freebore gun. It's right at 100fps difference.

Those are all 5-shot groups? They all look like 3-shots.

Interesting comment Kinetic. Anyone seeing the same thing?

My TacA1 is taking ~43.2gr H4350 to get the 140rdf’s up to average around 2715fps. I took it up to 44.0gr and get to around 2780 fps. In hornady cases seated long.

Factory hornady 140 eld M ammo is averaging 2680fps and the factory federal 130 Berger load was around 2780fps.

Temperature outside being 30-50degF.

I had this posted in another thread. Easy to copy and paste for chrono info.

6.5 CM
Once fired Lapua Brass
CCI 450 primers
H4350
Berger 140 gr. Hybrid Match
Tikka Tac A1 24" factory barrel
Magnetospeed V3 chrono
2.877 COAL/2.188 CBTO
*5 shot groups

41.7 grains
2700 avg.
SD- 7.4
ES- 19
.53 MOA

41.8 grains
2712 avg.
SD- 7.4
ES- 21
.85MOA

41.9 grains
2722 avg.
SD- 7.1
ES- 17
.52 MOA

42.0 grains
2727 avg.
SD- 7.4
ES- 18
.65 MOA

42.1 grains
2733 avg.
SD- 5.9
ES- 15
.53 MOA

42.2 grains
2737 avg.
SD- 5.9
ES- 15
.59 MOA

42.3 grains
No Data
.52 MOA

42.4 grains
2758 avg.
SD- 5.8
ES- 16
.72 MOA

42.5 grains
2764 avg.
SD- 8.2
ES- 20
.39 MOA

42.6 grains
2779 avg.
SD- 15.2
ES 40
.37 MOA

No signs of overpressure.

Some other data but different brass and bullet. Posting for FPS comparison.

All above specs apply except:
Twice fired Hornady brass
CCI BR2 primers
Hornady 140 gr. ELD Match bullets
2.795 COAL/2.186 CBTO
*3 shot groups

41.7 grains
2734 avg.
SD- 13.3
ES- 23
.33 MOA

41.9 grains
2750 avg.
SD- 12.0
ES- 24
.53 MOA

42.1 grains
2748 avg.
SD- 4.5
ES- 11
.67 MOA

42.3 grains
2770 avg.
SD- 7.4
ES- 15
.60 MOA

42.5 grains
2778 avg.
SD- 22.0
ES- 44
.47 MOA

42.7 grains
2786 avg.
SD- 9.0
ES- 18
.58 MOA

Jefe: How far are you seating off the lands? I'm quite a bit longer at 2.273 CBTO for .020" off.

Using Hornady 1x fired brass I also haven't been able to (likely unneeded just yet) bump the shoulders.

that Tikka Tac A1 has a 0* rail but I want 20MOA. what other than Spuhr mounts would you recommend?..

ra2bach said:

that Tikka Tac A1 has a 0* rail but I want 20MOA. what other than Spuhr mounts would you recommend?..

Click to expand...

You may consider the Burris XTR Signature mounts

My Tac A1 is sitting on the dining room table in the box, optic is in the mail.
Love seeing this post! ?

j741 said:

You may consider the Burris XTR Signature mounts

Click to expand...

thanks. yeah I have a set coming, should be here today or tomorrow. I'll mount them up and let you know but I think I'll still probably go for a Badger, Nightforce, or Aadland mount eventually...

BlueWater said:

Jefe: How far are you seating off the lands? I'm quite a bit longer at 2.273 CBTO for .020" off.

Using Hornady 1x fired brass I also haven't been able to (likely unneeded just yet) bump the shoulders.

Click to expand...

2.188 and 2.242. Lans are at 2.31 full stop or 2.29 just touching. Which I believe is too long for the mag. I'm so new to loading that my COAL measuring skills are still novice.

Both measure at CBTO.