Sinclair - Bump Gauge Insert Size:338 Lap (#20A) 20° which combines the functions of

which combines the functions of a rangefinder and speed sensor

Just get the die set-up in the press with the appropriate calibre collet (sold separately)

Screws internally to our M

Sinclair "Shark Fin" Compatible

Sinclair - Bump Gauge Insert Size:338 Lap (#20A) 20° which combines the functions ofSinclair Bump Gage Inserts are used to measure the amount of case shoulder bump when setting up full length sizing dies. Rather than measuring to the datum line, these gages indicate off of the shoulder of the case to get a better, more easily assessable measurement of how much you are actually sizing your cases They can install in either of the Sinclair comparator body (XL) or Hornady Body and are machined to fit particular shoulder angles of