Vertical stringing...

A.G. WILSON · April 19, 2005, 08:23

I did a search on vert stringing, saw the treads about tightening the bolt /BC lockup. Makes sense but I'll try that as last resort another time. My last session at my range produce two distinct groups on the same target. The first was a nice 2" group into a ragged hole (about 10 rds). The second group was about 5-6" high, still a respectable 3" group. I was packing up and noticed that the Imbel flash hider was loosey-goosey on the muzzle. Will this cause vert strings? Any suggestions on the best, non-permanent way to attach the F.H. firmly? Who do you recommend? Thanks for any suggestions.

dougjones31 · April 19, 2005, 08:55

Your FH is the problem most likely.

Screw off the FH and apply loc-tite to the threads and screw it back on and torque it down real tight and you should not have any problems. It probably was never tightened real good after the gun was built.

A.G. WILSON · April 19, 2005, 09:53

Thanks dj31. I have some experience in machine & welding. I'm not familiar with a Loctite product that will withstand the heat that a muzzle thing has to endure. I haven't measured the temp of a FH after firing a full mag, but I bet its more than 300. Please educate me on a high temp Loctite. Thanks again

dougjones31 · April 19, 2005, 10:51

272 (Red)Threadlocker High Temp./High Strength

Withstands temperatures to 450°F. Provides a fast cure on most surfaces including "as received" fasteners. Recommended for bolts up to 1 1/2" (36 mm) in diameter. Heat and hand tools are required for disassembly.

246 Threadlocker High Temp./Medium Strength
266 Threadlocker High Temp./High Strength
272 Threadlocker High Temp./High Strength
294 Threadlocker High Temp./Wicking Grade

dougjones31 · April 19, 2005, 10:56

Imbel just torqued their FH's on and they do not come off! I use a drop of 272 Red on mine and torque the heck out of them and I have never had one come loose.

Does the temp get abpove 450 degrees? Good question...I have never measured. If it does then the torque is enough to hold the FH on anyway.

shootist87122 · April 19, 2005, 23:04

If it does not hand time correctly you may want a timing washer (DSA sells) or try a different FH. The washers come in diff thicknesses, but I think you just get what they send. You want it to hand time at about 10:00 - 10:30, similar to hand timing a receiver, but a little more off TDC.

If it hand times correctly, I use Blue Loc-Tite (so I can get it back off without heat). If it's a bit too easy to torque on, I use Red or Loc-Tite #620 Retaining Compound, which is even stronger.

April 19, 2005, 08:23	#1
A.G. WILSON Registered FALaholic #: 6474 Join Date: May 2002 Location: east central Alabama Posts: 86	Vertical stringing... I did a search on vert stringing, saw the treads about tightening the bolt /BC lockup. Makes sense but I'll try that as last resort another time. My last session at my range produce two distinct groups on the same target. The first was a nice 2" group into a ragged hole (about 10 rds). The second group was about 5-6" high, still a respectable 3" group. I was packing up and noticed that the Imbel flash hider was loosey-goosey on the muzzle. Will this cause vert strings? Any suggestions on the best, non-permanent way to attach the F.H. firmly? Who do you recommend? Thanks for any suggestions.

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April 19, 2005, 08:55	#2
dougjones31 Registered FALaholic #: 6967 Join Date: Jul 2002 Location: South Carolina Posts: 4,282	Your FH is the problem most likely. Screw off the FH and apply loc-tite to the threads and screw it back on and torque it down real tight and you should not have any problems. It probably was never tightened real good after the gun was built.

April 19, 2005, 09:53	#3
A.G. WILSON Registered FALaholic #: 6474 Join Date: May 2002 Location: east central Alabama Posts: 86	Thanks dj31. I have some experience in machine & welding. I'm not familiar with a Loctite product that will withstand the heat that a muzzle thing has to endure. I haven't measured the temp of a FH after firing a full mag, but I bet its more than 300. Please educate me on a high temp Loctite. Thanks again

April 19, 2005, 10:51	#4
dougjones31 Registered FALaholic #: 6967 Join Date: Jul 2002 Location: South Carolina Posts: 4,282	272 (Red)Threadlocker High Temp./High Strength Withstands temperatures to 450°F. Provides a fast cure on most surfaces including "as received" fasteners. Recommended for bolts up to 1 1/2" (36 mm) in diameter. Heat and hand tools are required for disassembly. 246 Threadlocker High Temp./Medium Strength 266 Threadlocker High Temp./High Strength 272 Threadlocker High Temp./High Strength 294 Threadlocker High Temp./Wicking Grade

April 19, 2005, 10:56	#5
dougjones31 Registered FALaholic #: 6967 Join Date: Jul 2002 Location: South Carolina Posts: 4,282	Imbel just torqued their FH's on and they do not come off! I use a drop of 272 Red on mine and torque the heck out of them and I have never had one come loose. Does the temp get abpove 450 degrees? Good question...I have never measured. If it does then the torque is enough to hold the FH on anyway.

April 19, 2005, 23:04	#6
shootist87122 Registered FALaholic #: 7202 Join Date: Aug 2002 Location: NM Posts: 5,126	If it does not hand time correctly you may want a timing washer (DSA sells) or try a different FH. The washers come in diff thicknesses, but I think you just get what they send. You want it to hand time at about 10:00 - 10:30, similar to hand timing a receiver, but a little more off TDC. If it hand times correctly, I use Blue Loc-Tite (so I can get it back off without heat). If it's a bit too easy to torque on, I use Red or Loc-Tite #620 Retaining Compound, which is even stronger. __________________ "So in the Libyan Fable it is told, That once an eagle, stricken with a dart, said, when he saw the fashion of the shaft, it is by our own feathers, not others hands, are we now smitten." -Aeschylus