this one is drilled for 30 cal i always use a 21/64th bit which is .328 , baffle design and spacing is more important then how tight the bore is around the bullet specially on a gas gun
this is on a 6mm arc 6 baffles in this can shooting full power 75g bullets at over 3k fps
[video=youtube;MtjbdrXO36c]https://www.youtube.com/watch?v=MtjbdrXO36c[/video]
this is on a 6mm arc 6 baffles in this can shooting full power 75g bullets at over 3k fps
[video=youtube;MtjbdrXO36c]https://www.youtube.com/watch?v=MtjbdrXO36c[/video]