Installed my SF3P-556 on my MK18 tonight. I could not get the flash hider to time exactly straight up and down. I’m slightly OCD about things like this. I’m assuming this won’t cause an issue. I tried the purple shim and it would only time with about 15 foot pounds. The next size up is the no-color shim and its with 30 foot pounds. This is whats on there now. I could probably get it to time with 35 foot pounds, but I dont believe that is recommended.
Have you torqued it, then loosened it, and then re torqued it a couple times to see if that give you a little more rotation?
It seemed to line up better before I added the rockset. I tried loosening it and re-torquing it once but it didnt seem to help. Perhaps I shall try it a few more times.
Sometimes it just takes a bit of time to find the right combo. Go to 35 ft/lbs and back it off several time then see if it goes at 30 ft/lbs. The reason we don’t want you going way above 30 ft/lbs is because it can constrict the bore at the crown.
Have you tried using a combinations of two shims to get a value between the two high/lows you have?
Also… how much rockset? A few drops of rockset shouldn’t change the timing.
This. AND throw that timing wheel SF gave you in the garbage. I have installed a ton of these things, and the damn thing NEVER works with the wheel. The only info SF gives you that you might want is the thickness of the shims. Keep playing with different combos and you will find one that will work to make it perfect. I am OCD like you and require all of mine to line up perfect.
No shit about that! I had a guy come over for a bunch of work on a 6933… and God bless him… he wanted to help with the mount install part of the job… and insisted on using that God damned tard wheel. Painful.
I sometimes use a super thin piece of peel washer to keep the torque on low end of the scale.
He’s ALIVE!!! 
Yeah… those are handy. I keep a twisty tie with all kinds of peel washer slices and stuff looped on it.
Thank you. I will try this.
No, I would have to use a combination that allowed for one more complete rotation… and I wasnt sure how to accomplish that.
I dunno, just used enough to get all the threads wet 
So probably to much. Maybe I should start over… is this going to be a PITA to get loose? How do you clean off rockset?
Good idea, maybe i’ll pick one up to try another combo
Time a flash hider??
The hider will not be hard to remove. Use acetone to remove the rocksett that is on there.
Two small drops. One on the barrel threads, and one in the mount. A little goes a long way with rockset.
Yes brother I’m around but far less active in everything. I have the Lyme and Bartonella in remission now but developed Dysautonomia now with hyperadernic POTS with it. My Doctors are saying that I have a 70% chance that this should heal itself within 2-5yrs. I can’t fly (due to POTS) so I can’t go to SHOT. My heart does all kinds of weird stuff so I can’t shoot USPSA nor 3gun. I reply on stuff here when I have the time.
God bless you Robb.
Agreed. Robb, you have been in our thoughts and prayers.
I appreciate all you have done for me and everyone here over the years.
Damn, Robb, sorry to hear about your plight.
Prayers Sent. Thank you for all your Contributions over the years… I learned a ton from them and still reference them from time to time.
i have found the timing wheel to work perfectly when i torqued to 30, then looked to see what shims to use, then put it back on and torqued again.
Wow. I remember the Lyme and Bartonella, but the hits just keep coming huh? I hope things improve quick for you.