Studies graphing frequencies in barrels?

[RockyMtnMT]

Because of this thread I just ordered some Limbsaver barrel tuners.

 

[asd9055]

It has always worked for me

 

[asd9055]

Because of this thread I just ordered some Limbsaver barrel tuners.

I think those actually are the first barrel tuners. Predate the BOSS. I remember a friend with a rubber doughnut on his rifle barrel in mid 80s