The Speer data claims over 2600 with a 120gr Gold Dot over PP2000MR in the 6.5. I'll find out if that's a real thing when I get a LabRadar in a month or so.
The SAAMI drawing floating around shows a very tight neck on the ARC, .274, as opposed to .276 on the .243 and 6mm Rem, and IIRC .274 on the .24 Nosler. My .243 loads run about .271 in Hornady or Nosler brass.
Last edited by Pappy348; 06/04/20.
