Tikka Speeds w/Factory Loads

[TxxAgg]

Got a 6.5x55 22" T3x to try soon

I didn't shoot through a chrono, but drops indicate that velocity actually matched the box

Sellier & Bellot
131 grains
2600ish fps

 

[rileybassman]

.

 

[aftriathlete]

Tikka T3X Superlite 6.5 CM, 150 rounds down the barrel. Factory 140 ELDM. 2655 measured by Magnetospeed.

 

[Seeknelk]

So can someone shed some light for me on what makes a barrel slow? I've heard both tighter bore and looser bore. Like a tighter bore could build better pressure...but friction. My 18" Tikka 6.5 is anemic with 136 scenar and h4350...getting better speeds with Norma urp load work I have to finish. I'll have to check notes but I'm talking topping out with the 136 ,h4350 Lapua brass at 2490 or something maybe in the 25s. I'm ordering a 20" 6 cm barrel and neck some of the suck out of it! My 22cm is my fave but this 6.5 is such a dog so far. Accurate for sure tho!

 

[aftriathlete]

At least with Tikkas I have read all over the place that it’s because of extra clearance in the throat that reduces pressure.

 

[Peakbagger46]

Sako A7 (glorified Tikka) 30-06 24.5” barrel. 180gr Accubond handloads with Rel 22 2,875 fps.

 

[TxxAgg]

Bump

 

[jbosk15808]

270 Win Veil 22" Barrel

Browning Silver Series 150 Gr
Max: 2770 Min: 2727 Avg: 2749

Norma Whitetail 130 Gr
Max: 2925 Min: 2894 Avg : 2910

Hornady American Whitetail/Interlock 140 Gr
Max: 2836 Min: 2749 Avg: 2792

Federal Premium Barnes TSX 130 Gr
Max: 3027 Min: 3000 Avg: 3012

Hornady Precision Hunter/ELDX 145 Gr
Max:2795 Min: 2729 Avg: 2754

Couple observations:
Federal was closest to listed box muzzle velocity <50fps off. I used the Browning 150 gr ammo on my last hunt and I shot out at various distances out to 500 yds to verify drop and reversed the calculations to determine muzzle velocity. I came up with a MV of ~2625 fps in the field which is a lot slower than what chrono is reading.