Loose sound mod

[Safari Hunter]

Always check mine after each shot. Had one loose in Africa once on a borrowed 308 and missed a warthog at 70 yds. Loads of ribbing from the PH until we worked out it was not the workman but the tools!!

 

[Sharpie]

If your barrel has a right hand twist (most do), then every shot will kick the rifle anticlockwise and risk loosening the mod. Its invisible to most because it happens so fast, through a small rotation, but it is sharp and forceful.

The heavier the bullet, faster the twist, lighter the rifle, heavier the mod. the worse this gets.

There is a very significant torque reaction working to loosen the moderator. And mess up the barrel dynamics if you have a long thin whippy sporter barrel.

Keep them tight, check after every shot. Don't grease the threads, dry is better.

 

[Brithunter]

If your barrel has a right hand twist (most do), then every shot will kick the rifle anticlockwise and risk loosening the mod. Its invisible to most because it happens so fast, through a small rotation, but it is sharp and forceful.

The heavier the bullet, faster the twist, lighter the rifle, heavier the mod. the worse this gets.

There is a very significant torque reaction working to loosen the moderator. And mess up the barrel dynamics if you have a long thin whippy sporter barrel.

Keep them tight, check after every shot. Don't grease the threads, dry is better.

Hmmm that is not what a lot of moderator makers recommend if I recall correctly. Most suggest the use of an anti seize grease or compound.

I also find it rather strange that those whom are cutting these threads and fitting these moderators never seem to have thread gauges and rely upon the moderator manufacturer to cut their right then cut the barrel too suit. Trouble is when one changes moderator it may or may not fit. I can think of no other example of this non compliance of engineering standards.

I wonder how many even measure the threads effective diameters using wires or O-V gauges?

 

[ejg]

If your barrel has a right hand twist (most do), then every shot will kick the rifle anticlockwise and risk loosening the mod. Its invisible to most because it happens so fast, through a small rotation, but it is sharp and forceful.

The heavier the bullet, faster the twist, lighter the rifle, heavier the mod. the worse this gets.

There is a very significant torque reaction working to loosen the moderator. And mess up the barrel dynamics if you have a long thin whippy sporter barrel.



Hmmm that is not what a lot of moderator makers recommend if I recall correctly. Most suggest the use of an anti seize grease or compound.

I also find it rather strange that those whom are cutting these threads and fitting these moderators never seem to have thread gauges and rely upon the moderator manufacturer to cut their right then cut the barrel too suit. Trouble is when one changes moderator it may or may not fit. I can think of no other example of this non compliance of engineering standards.

I wonder how many even measure the threads effective diameters using wires or O-V gauges?

Very true Kevin.
basics of engineering...
edi

 

[dvbookshop]

I got a nearly 2 foot vertical impact shift when mine loosed by just 1/8th of a turn!

 

[jcampbellsmith]

Always check mine after each shot....

... check after every shot......

Not sure I follow these comments at all. How do you get the deer to stay put after you have taken your first shot? Regards JCS