30 cal 1:10 #4 Shilen.....
I dialed it in for a 300WSM.
I first set it up "between centers" thru the headstock indicating the outside of the blank for a start point.
I then went inside........I use Gordie's Method and in this case set my main in-jaw pivot point right on the leade to make it easy.
.3003 bushing tight in the chamber leade area and an inch inside the muzzle...... so far, so good. Chamber end lapping bell would take a .3012 for the first 1/2", then a .3008 for another 1/2" then .3003
Now using only the 1.5" around and mainly beyond the leade I dialed it in.
And screwed it up. soon had the muzzle flopping like a fish.
Eyeballed it back to center and tried again. Screwed the pooch again, lost it for the second time.
Stood back, took a few breaths and realized I was adjusting "thru center" each time in too-large increments. So, finally, after a half hour of jacking about on the work side of the headstock I got thee wabble out of two points 1.5" apart. I went back to the outboard side and buried a long-stem Lon'Gisland into the bore and started ooozing 'er down to touch the top of the lands......'tic'....... just the teensiest twitch
'tic'
'tic'
'tic'
clear 'round the dial!!!
My first thought?
"Ohhh Pooo, this barrel will NEVER shoot!"
I dialed it in for a 300WSM.
I first set it up "between centers" thru the headstock indicating the outside of the blank for a start point.
I then went inside........I use Gordie's Method and in this case set my main in-jaw pivot point right on the leade to make it easy.
.3003 bushing tight in the chamber leade area and an inch inside the muzzle...... so far, so good. Chamber end lapping bell would take a .3012 for the first 1/2", then a .3008 for another 1/2" then .3003
Now using only the 1.5" around and mainly beyond the leade I dialed it in.
And screwed it up. soon had the muzzle flopping like a fish.
Eyeballed it back to center and tried again. Screwed the pooch again, lost it for the second time.
Stood back, took a few breaths and realized I was adjusting "thru center" each time in too-large increments. So, finally, after a half hour of jacking about on the work side of the headstock I got thee wabble out of two points 1.5" apart. I went back to the outboard side and buried a long-stem Lon'Gisland into the bore and started ooozing 'er down to touch the top of the lands......'tic'....... just the teensiest twitch
'tic'
'tic'
'tic'
clear 'round the dial!!!
My first thought?
"Ohhh Pooo, this barrel will NEVER shoot!"