OAL for Ruger M77 Mark II?
02-05-2004, 10:44 PM
#2
Nontypical Buck
Join Date: Feb 2003
Location: Tahlequah, Oklahoma
Posts: 2,584
02-15-2004, 05:00 PM
#4
Join Date: Aug 2003
Location: Denver, CO
Posts: 77
RE: OAL for Ruger M77 Mark II?
There is a bit of confusion in the statements above. The dimension from the bolt face to the point of full land height is a constant for that chamber. The exception is that this dimension will change as the throat wears away due to erosion, but this is over a large number of rounds fired. This length can be measured with a Stoney Point tool or by careful construction of your own dummy round.
The comparable dimension on your cartridges which is often refered to as OAL will differ based on bullet shape and the way the bullet is pressed into the case by the seating die. For example, if you set your seating die to seat Spitzers and then seat round nosed bullets, the seating depth would probably be quite different. For me, the best way to measure the seated bullet length is to use a Sinclair Bullet Comparator and my caliper. That way I always measure to the point on the bullet where the dia. is equal to the minor dia. for that caliber. Good luck.
The comparable dimension on your cartridges which is often refered to as OAL will differ based on bullet shape and the way the bullet is pressed into the case by the seating die. For example, if you set your seating die to seat Spitzers and then seat round nosed bullets, the seating depth would probably be quite different. For me, the best way to measure the seated bullet length is to use a Sinclair Bullet Comparator and my caliper. That way I always measure to the point on the bullet where the dia. is equal to the minor dia. for that caliber. Good luck.
