Your new member checks in, the miscreant named by Fatboy and Ebb: jhuskey, Bill to those who knew me 40 + years ago.
Good Morning Chris, Ebb, and Blake. I have missed two of you a lot. Blake, I am learning on another board.
I have about 20 years with the 6.5-06. I am not a gunsmith but I can build my own if the urge strikes, and these days, it rarely strikes... I'd rather pay a professional who does it every day. I have built them on winchester, Remington, mauser, 1903 and savage long actions. I have used Douglas stainless, chrome moly, Hart, Kreiger, Schneider, shilen, and benchmark barrels. I have used 8 and 9 twist. I've stayed with 8.
I've never done the a-square, it was too easy to run 06 brass in a die, trim, load, and fire.
There is absolutely no reason to get an inaccurate 6.5-06 in today's gunsmith world with the quality products out there today. The 6.5-06 was once a European factory cartridge that turned into an American wildcat. It's been around a long time. The only drawback to this cartridge is considered to be the shoulder angle that allows a lot of powder to be burned in the throat. The 6.5-284 shoulder allegedly "fixed" this problem. Jmho, it's never been a problem.
The most common brass is 3006. Just run it into a rcbs die with the right amount of lube and you have a ready case after you trim it to square the mouth. Load and shoot.
Second is 270, you just have to trim more. This is noted in the preceding posts. There is no bad information posted here, it is all excellent.
Then there is 2506. Those three brass selections work fine.
Are there issues with brass? Yes, depending on the reamer used. Back in the day, a .301" neck was the most common. 2506 brass was a little on the thin side and you could get split necks if you turned the necks too thin. I got the highest velocity out of turned 2506 cases. I never had any problems with 270 or 3006 brass with a 301 neck. I got velocity up to 3200 safely in 26" barrels with 142 sierra BTHP match bullets, but found in every rifle I built the nodes were 2850, 2950, 3050, and 3150. I found the best compromise at 2950 on long range performance, recoil, throat wear, and all around use. The easiest load I ever did was h4831 in either form. Barrel life shooting camp perry type competition has been 1800 to 2000 rounds. The hunting rifle has gone over 3500 rounds. Run and gun shoot then hot competition has eaten barrels at 1200, with the most common average being 1500.
I've never had a 6.5-06 that didn't shoot. This is a good choice caliber and cartridge.
Now, heresy, the 6.5-284 has advantages, the 260 Ackley is right in there, and the 6.5 Creedmoor is worth looking at, all with a 140 bullet running 2950. I have seen these run with a select powder and corresponding barrel lengths.
Shooting heresy in the foot, I've consistently gotten 2950 with 4831 in carry friendly barrel lengths that made this caliber a joy to own, carry daily, and shoot. The 4831 load range is 51-53 grains with any 140 bullet. All reloading safety practices apply on loading any internet posted loads.
I hope my first post here meets standards. Morning all.