Re: 6.8 SPC
What do you want to know? 18" SPCII chambered rifles have been pushing 85gr TSX up to 3000fps, remington/SAAMI chambered rifles can get up to 2550fps with 110 and 115gr bullets. 130gr can be single-shot loaded at velocities close to 2400fps with the SAAMI spec chamber. May be able to get a solid 200fps or more with the SPCII chamber. Basically the 6.8SPC has evolved quite a bit from what it was during its inception. Preferred barrel specs nowdays are 1/11 twist 3 or 4 groove with the SPCII chamber. Its the same as the SAAMI but with .05" longer leade.
Bullets avaliable for loading; Barnes 85gr TSX, 110gr TSX, Nosler 110gr Accubond, Hornady 110gr HPBT, 110gr VMAX with and without cannelures, 110gr HPFB, Remington 100gr SP, 115gr FMJ, 115gr CoreLokt, Sierra 115gr SMK, 110gr Pro Hunter, 90gr HP Varminter, Speer 100gr JHP, 90gr TNT.
Preferred powders for the 6.8 are H335, Reloder-7, H322, Lil Gun, Benchmark, H4198, RL-10X, AA1680, N130.
If you want load data, visit 68forums.com they have an absolutely extensive list of load data, complete with velocities and barrel specs, listed by bullet weight and powder type.