I bought a .336 wm from another member and it has a custom barrel. I went to boresight it with my Bushnell kit and found that the metal "jag" would not fit into the barrel, it was too tight. All my other rifles are fine with this system in other calibres, should I be concerned? Thanks-karl
boresighter won't fit?
- Thread starter hermie
- Start date
- Location
- Whitehorse, Yukon
Get your chamber designations correct and try again!
The little expander plug is all the way out from the fingers? The fingers are at their smallest diameter? Don't use any force to try to get the spud into the bore, you don't want to scratch the lands.
You can always boresight the old fashioned way by setting the rifle in an improvised rest, looking through through and aligning the bore on a mark, and then adjusting the scope until it is also aligned on the same mark.
You can always boresight the old fashioned way by setting the rifle in an improvised rest, looking through through and aligning the bore on a mark, and then adjusting the scope until it is also aligned on the same mark.
hermie said:
Are you sure that this is a 0.336 WM calibre or are you talking about the dimension of your bore? No matter what, if you have the standard Bushnell Bore Sighter, you should have 3 arbours with one covering from 7mm to 0.35 and this one should fit your bore with no problems. If too loose, just use the next one - 0.35 to 0.45. If 0.35 to 0.45 is the only arbour you have, then I would expect a tight fit to say the least.
Good luck!
Duke1
Wrong rod. - dan
hermie said:
My bet is your new barrel is cut rifled. It is really easy to manufacture a cut rifled barrel to slightly different specs. A difference of one half of one thousands of an inch can cause exactly what you are experiencing. You simply have a custom barrel with a slightly tighter bore than your sloppy factory rifles.
You would not have this problem if you have the adjustable arbors mentioned in a previous post. Get another arbor that fits or ignore the boresighter and just shoot it.
