Im probably overthinking this, but help a brother out. Im installing a SOCOM muzzle brake on a 12" LMT barrel and something just doesnt seem right to me. I follow the instructions and added the correct color shim but Im not getting to the 20-30 FT LB that the instruction require.

Lets make sure I have this right.
1.) The chamfered end of the spacer is the end with the diagonal cut in it and that end points to the barrel.
2.) You check for what shim you need with the spacer on, yes?
3.) With spacer and shims in place and the MB hand tightened, the notch at the bottom of the MB should be at the 5 o'clock.
4.) Must use the spacer?

Whats more important correct torque value or correct shims or...?

There is a Surefire video with Barry Dueck on YouTube that will explain it. I have three SFMB556's installed on my rifles, the most recent one was yesterday and I don't remember them being overly complicated.

How are you not getting the correct torque? Are you saying at 20-30 ft/lbs you are going past bottom dead center for the indexing tab or it's not getting to bdc? If so align the tab with different shims so it's higher or lower and see if that with 20-30 ft/lbs gets you the tab at bdc. The instructions tell you basically how to install their mount, but as barrels/threads/torque wrenches are all different, you may need to try some different combinations to get it exactly how you want.

Surefire squared me away.

Care to enlighten the rest of the group that may have this or run into it..