I built a 6.5-06 in 2015, and it is my most successful long range rifle to date. [600 yard targets keeping it in the kill zone. Made 629 yard kill on a small animal.]
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Dumoulin Mauser receiver from SARCO
Dumoulin trigger replaced with Timney Featherweight trigger. Adjusted pull force from 3.25 pounds from Factory to 1 pound.
Making Weaver S45 and S54 scope bases flat on the bottom to fit square bridges of Dumoulin Mauser receiver
Sightron SIII 3.5x10x44 moa turrets moa reticle with illuminated dot, Weaver tactical rings 48355
Shilen Select match #3 taper Stainless barrel 6.5mm bore 26" long rachet rifling
Cut inch off each end = 24", cut Mauser threads, cut 6.5-06 A square chamber with 0.005" headspace, cut crown at 11 degrees and chamfer ID and OD of muzzle.
Subsequently measure 2.528" of neck space [for trimming cases] [ 6.5-06 A square cannot use necked 270 brass without trimming, but can use 30-06 necked brass]
fired cases necks measure 0.298" in the middle, chamber measures 0.300" in the middle [chamber neck narrower in front and wider in rear]
Boyd's pro varmint Mauser stock.Replaced Boyd's recoil pad with Limbsaver large grind to fit pad
Home made rear Aluminum alloy pillar glass bedding with pre stress in compression with Devcon steel putty
Home made front pillar/recoil lug/sling stud base/ bipod base Aluminum alloy milled out 9" long, drilled and tapped for 10-32 Uncle Mike's studs, glass bedding with pre stress in compression with Devcon steel putty.
Front action screw clamps bottom of recoil lug to Aluminum bed block so there is no lengthwise bind on receiver.
Drilled clearance holes in stock for 1/4-20 lag bolts in Karsten's custom cheek rest model A
Harris bi pod attachment knob replaced with KMW pod loc
Custom FL sizer body from Forster neck honing service by paying for double hone out fee from 25-06 body to 0.292" neck.
Custom collet neck die mandrel from Lee Custom Mandrel reduction service by paying triple fee for 270 mandrel from a collet neck die down to 0.262", but leave the top 1/4" alone to fit a 270 collar
120 gr Nos Bal tip moly with 50.7 gr IMR-4166 powder 3.34" , Win 30-06 brass, that QL estimates at 3236 fps 65 kpsi using IMR-4895 in the QL library.
9-23-2015 range report:
Chronographs at 3197 fps
I called up Forster and went around and around until they sent me a 25-06 Full length sizer die body honed out to a 0.292" neck.
That would make it an ideal 6.5-06 sizer die body, for $57. [double the honing charge]
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I called up Lee and went around and around until they agreed to reduce a 270 mandrel from a collet neck die down to 0.262", but leave the top 1/4" alone to fit a 270 collar.
This will make it ideal for turning a 270 Lee collet neck die into a 6.5-06 die.
$20 plus shipping [quadruple the reduction charge]
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In each case they had to go talk to the machinist.
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I am necking down 30-06 brass.
270 brass necked down is too long for my 6.5-06 A Square reamer, and would have to be trimmed.
I could not get the Nos 142 gr long range to work, but the 120 gr Nos bal tip have averaged 0.92" 5 shots @100y
3.34" 120 gr nos bal tip moly 50.7 gr IMR-4166 3197 fps chrono 24" barrel 8" twist 5R #3 barrel