Ogive measurement?

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papajoe222

papajoe222

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should you adjust your die for each bullet when using the ogive to measure from, or should I set the die and seat them all based on an average? I've noticed the measurement isn't consistent from bullet to bullet.
 
Not from one type bullet to the next, but all of one type, correct?

Set the die and leave it.

What caliber and application? Target shooting with a .222 by chance?

Welcome to THR.
 
I adjust my dies based on ogive measurement for a given make and model of bullet. But once set, I do not measure the ogive for each bullet in a box that I've purchased.

I started measuring to ogive when I saw COL variances in finished rounds upwards of +/- .005". But with ogive measurements I see +/- .001". I've found ogive measurement of finished rounds to be very reliable.
 
Quality bullets should be pretty consistent when measured from the datum and not the tip.
with seaters some might work better tan others in terms of the angle and always check with very pointy bulltes so teh metplat/tip doesn't
bottom up on the seater button. This can also ruin the bullets.
manufactures will give you a solution for this with a deeper button like it happens with some VLD and all copper CNC cut bullets.
Otherwise simply adjust as needed and set it firmly.
measure and then measure again to be sure.
 
I load .010 off the lands for my .308 and with the Hornady Match 168gr. I'm getting some finished round that are .008 longer (none shorter) that the rest. I'm attributing this to the fact that I changed from Sierra MatchKings. I rarely had more than .003 with them and never reset them, but I'm thinking I'll need to with some of these. My line of thought is that by doing so, I'll be setting them deeper than the others and pressures and velocity will be different than the rest. For future batches, I'll be setting the die to seat .005 deeper. That should eliminate any excessive length rounds while the increase in jump on the others will be minimal.
 
As posted, overall cartridge length will vary more than ogive to base will. The 168 Gr SMK is designed to be able to make a jump to the lands and still shoot very well. I just load them at 2.800 and call it good.

.008 difference in ogive to base for the same bullet sounds awfully big. If you mean the SMK varies that much from the Hornady, that wouldn't be unusual. I have some of each, but my Hornady 168s are still unopened.
 
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