Anyone know how far a iron block 5.3 can be bored? I know up to 5.7 specs but any beyond that?

 

bored to 5.7 is the biggest you can go

 

I read somewhere it can go 4.00, but dont hold me to that! Look very careful, good luck!

 

get the 5.3 sonic tested and go accordingly from there ive seen in my own eyes 5.3's bored to 6.0's but that was the highest ive ever seen but only permitting if the block looks good after being tested so you know the strength of your walls

 

thanks guys.