The Zero Check Thread

[gimp]

In case of shifting poi check your suppressor if you have one. carbon build up will add mass... which will alter harmonics...

same as a tuner essentially

How much carbon weight have you see produce this? How much POI shift ?

[woods223]

How much carbon weight have you see produce this? How much POI shift ?

I’d like to see some figures too. Of the various suppressors I’ve had over the years can’t say I’ve noticed any significant hunting accuracy shift with suppressor carbon build up. Couple of CJA AR15’s the suppressors hardly ever came off rifle, Gunworks can’t clean anyway. By the time the suppressor was getting carboned up (4000+ rounds ) the rifle was getting worn out anyway, still shot good enough for pest control work. As an aside, I still don’t clean suppressors, they run quieter with a bit of carbon buildup and I can’t be arsed with cleaning all the time. Each to their own though.

[Shamus_]

I’d like to see some figures too. Of the various suppressors I’ve had over the years can’t say I’ve noticed any significant hunting accuracy shift with suppressor carbon build up. Couple of CJA AR15’s the suppressors hardly ever came off rifle, Gunworks can’t clean anyway. By the time the suppressor was getting carboned up (4000+ rounds ) the rifle was getting worn out anyway, still shot good enough for pest control work. As an aside, I still don’t clean suppressors, they run quieter with a bit of carbon buildup and I can’t be arsed with cleaning all the time. Each to their own though.

Actual real world experience

[STC]

How much carbon weight have you see produce this? How much POI shift ?

on my rifles? none... because I clean them. on other peoples suppressors that I serviced (because i got the clamps to separate stuck baffles) a surprising amount. layers that could be measured in mm...

Without knowing the exact density of the built up carbon the added weight would be multiple grams.

given that barrel tuners (which essentially shift a small amount of mass fractions of a mm) have a measurable effect on harmonics (poi, group size) this might simply be one of the contributing factors to shifting pois or peoples hunting rifle "suddenly" stopping to shoot well...

Now add to that that many suppressors (hardy) can't be opened to clean them...