Best long-distance 7mm or 30 cal rebarrel for Tikka T3x with .473" boltface?

[BringBackThe80s]

I thought tikka used the same receiver for short and long action just change bolt stop and mag ?

I already swapped the bolt stop and got 30-06 mags so I can load .308 and 6.5CM as long as I want to. But I think 3.35" is the longest COL that will fit in those 30-06-length Tikka mags.

 

[One300wsm]

Nothing would be easier than running a .284 mandrel through a 6.5rpm case. Get bushing dies for 6.5rpm and put an appropriate 7mm bushing in it. People have already done that and there's a reamer.... like this one.

7mm-6.5 Weatherby RPM - 4D Reamer Rentals

7mm x 6.5 WBY RPM Sretched out 284 Winchester case made by Weatherby. Chamber Reamer rental

4drentals.com

Looking around online it comes in at 78.9gr case capacity. About 5gr more than 280ai, 3ish less than 7rm. So In between those, closer to 7RM. If you ran it in a chassis with the mdt magazine, you can seat those bullets a bit longer.

I like this idea.

 

[Tanner]

I thought tikka used the same receiver for short and long action just change bolt stop and mag ?

They do, but even their long action doesn’t have the COAL latitude for an /06 based round with a high BC bullet in it.

 

[mitchellmountain]

284 win, and with the medium action on a tikka you can run the long heavy bullets if you want. I built mine on a true short action and am still pushing 140’s over 3000 fps.

 

[One300wsm]

284 win, and with the medium action on a tikka you can run the long heavy bullets if you want. I built mine on a true short action and am still pushing 140’s over 3000 fps.

What length barrel you running ?

 

[Bluefish]

I have a Tikka T3x originally chambered in .308 Winchester, but that barrel has been very finicky in comparison to all my other rifles. I've already spun on a 6.5CM barrel that has shot almost everything lights-out without any load tuning whatsoever, so I trust the action, barrel, and optics.

So now I want to get a barrel I can spin on and off chambered for a cartridge better suited than the Creedmoor for large game at long ranges. Un-finicky accuracy is paramount, followed by max distance with velocity above 1800-2000 fps and energy above 1000/1500 fpe while minimizing wind drift. That is highly dependent on bullet choice, of course, which will need to stay within 3.34 C.O.A.L.

The choice would be easy if Weatherby's RPM line included a 7mm or 30 cal option. In their absence, the highest performing options I have identified for this action length and .473" boltface are:
- 280 Ackley Improved;
- 280 Sherman;
- 300 Sherman; and
- 30-06 Springfield.

Any other options I overlooked? Any recommendations about the options listed?

Fast twist 25-06 or 25-06ai? Same case capacity as a 6.5 prc. The new 134 eldm or 13? TMK offer good ballistics at around 3000 fps. If you have to have a bigger diameter, then 6.5-06.

 

[One300wsm]

Fast twist 25-06 or 25-06ai? Same case capacity as a 6.5 prc. The new 134 eldm or 13? TMK offer good ballistics at around 3000 fps. If you have to have a bigger diameter, then 6.5-06.

Before I’d do ether 25-06 I would do 25 RPM or 6.5 RPM