OAL vs Ogive
#11
RE: OCL vs Ogive
honestly, I use a dummy round and a black magic marker.
when it's seated deep enough the lands quit scraping the ink off,
an OAL is taken
then
it's checked to see if it functions in the magazine
if it passes there, a load is worked up
and yes, COAL is played with a little bit
when it's seated deep enough the lands quit scraping the ink off,
an OAL is taken
then
it's checked to see if it functions in the magazine
if it passes there, a load is worked up
and yes, COAL is played with a little bit
#12
RE: OCL vs Ogive
"honestly, I use a dummy round"
I use a case that has been full lenth resized. Seat the bullet way out of the case, put a little grease on the bullet and then stick it in the gun and close the bolt. Take the round out, measure the OLA and reduce it by .010-.040 for the finished live round.
I use a case that has been full lenth resized. Seat the bullet way out of the case, put a little grease on the bullet and then stick it in the gun and close the bolt. Take the round out, measure the OLA and reduce it by .010-.040 for the finished live round.
#14
Typical Buck
Join Date: Sep 2006
Location: n.e. pennsylvania
Posts: 645
RE: OAL vs Ogive
it's the relationship of the ogive to the lands that matters. while there are different ways to measure it....by far the easiest is to use a comparator gauge. to use the tip of the bullet and go by an oal to determine the seating depth is downright risky.[8D]
#16
RE: OAL vs Ogive
I use the same as what ridge runner has there..At one time
I trimmed the little lead tip off the bullets and made them
all the same length..But now that I have gotten away from
the competion game,I don't worry about it at all...1 to 3
thousands doesn't matter..
I trimmed the little lead tip off the bullets and made them
all the same length..But now that I have gotten away from
the competion game,I don't worry about it at all...1 to 3
thousands doesn't matter..
#18
Nontypical Buck
Thread Starter
Join Date: Mar 2004
Location:
Posts: 1,837
RE: OCL vs Ogive
I also use a black marker but I take a unsized case and put a small flat spot in it by just pushing the side of the case against my bench, just enough to make the bullet a little snug. Then I black the bullet out with the markerand place it in the chamber and close the bolt. I then take it out of the chamber and carefully pull the bulet back out until I see where it stopped in the blacked out part. I put the bullet back in just to where the line in the blacked out part is and then measure the Ogive and that is my OAL unless they won't cycle in my magazine then I start seating deeper until they just barely will cycle in my magazine. I do this 3-5 times to make sure I get a good consistant measurement.