They are a lot of work. Greg of gretan rifles has a great video out that has been around for years http://www.gretanrifles.com Works well and up to a week ago my own .260 match rifle was sleeved. Went to ground PTG bolts. Accomplishes the same thing but gets rid of the bumps.
Give a call anytime if you have any questions or need some help,
Good Luck
JamieD
______________________________
Jamie Dodson
814-262-7994 Wolf Precision
AI Stocks and Accessories