agree, go to www.6mmbr.com
and read about all the 6s before you decide.
Unless you are building a fullblown BR gun, skip the 6PPC. go with the 6Br in either a .271 or .272 no neck turn gun with reamer based off Lapua brass. No need to neck turn that cartridge for what you want.
Lot of good 6 BR smiths listed on www.6br.com.
They all have the reamers and know tricks for 6br smithing.
Just take your 700, true the front of rcvr, lap lugs and add a 26-28" match grade barrel with 1-8 twist. Doubt the straight 6br will push the 115 DTAC like it should and plenty of great 100-108 gr bullets that will run in straight BR as good if not better. DTAC needs larger case normally.
A custom barrel installed will cost about $500. I personally like Broughton barrels. PacNor also makes a match grade relatively inexpensive and will chamber and fit to your action.
Forget custom dies for non BR gun, buy a set of Forester Bonanza BR dies in 6BR with micrometer seater for about $80 and if you want have the FL size die converted to bushings for $40 for Jim Carsenson (on BR.com also). No need to spend $300 plus for gunsmith custom dies unless full blown custom BR gun and even then easier ways for that cartridge, such as taking a Redding body bump die($25) and 10 pieces of fired brass,and sending it to Jim Carsentson and for $75 he will custom hone it to your chamber. Wilson inline seater is $50 and best on market, either the Forester or Redding are top of the line for 7/8x14 dies and much cheaper and just as good as custom seater.
Look at the stocks also listed on 6br.com. Richards Microfit has many good ones and relatively cheap.