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Posted: 2/3/2016 8:47:31 PM EDT
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As a pretty new reloader I've been seating by OAL. But if I wanted to start seating by ogive length, how do you determine that length you want to seat at since that is not given in books? A general explanation of explanation of ogive length would also be appreciated.
TIA |
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Quoted: As a pretty new reloader I've been seating by OAL. But if I wanted to start seating by ogive length, how do you determine that length you want to seat at since that is not given in books? A general explanation of explanation of ogive length would also be appreciated. TIA As you are just starting out, stick with OAL. Especially if loading for an AR as you are really loading to mag length anyway. Seating to the lands and measuring the ogive is an advanced technique used in target bolt action rifles. |
| The way I do it is I select about five bullets that appear to have little to no deformation of the meplat (tip of the bullet). I seat and measure until I get my desired length. Then I measure the ogive using the Sinclair comparator and use that measurement to check the rest of the loads as I go along. If you try to measure OAL you will drive your self crazy wondering why some are measuring +/- 0.010" which is due to the meplats being damaged or oddly formed on some of the bullets. |
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txag12,
You would start by using the published OAL (from base of case to tip, or meplat, of projectile). Once the bullet is seated to that depth, you would use a comparator tool, like this, to find the ogive length. You then measure each successive cartridge for the ogive length to determine if bullet seating is consistent. |
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