OAL Question

Eynhallow

Eynhallow

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I measure the OAL of my handloads from ogive to base, using a comparator. So, I have a loaded 22-250 round, using a 60grain Sierra Varminter which measrues 1.946" from ogive to base, and this measurement seats the bullet 0.010" off the lands. Is it not true then that ALL my handloads should be the same measurement (1.946"), regardless of manufacturer, weight or shape. The chamber of the rifle remains the same, therefore wouldn't the measurement from ogive to base have to be the same as well in order for the bullet to be 0.010" off the lands ???

Or am I missing something here ???
 
I would have to say no. If the shape of the ogive was different and it likely is, you would be measureing from a different starting point. It would be close but likely not the same.
 
OP: In theory you are correct. The point at which the ogive is bore sized should be the only factor. However you will find in practice that different bullets seem to fit into the bore differently.

Silver: The shape of the ogive is not the issue. It is the position on the bullet where the ogive is the same diameter as the bore that we are measuring. As long as the measurement is from case head to the ogive then all ammo should fit the same.
 
Silver: The shape of the ogive is not the issue. It is the position on the bullet where the ogive is the same diameter as the bore that we are measuring. As long as the measurement is from case head to the ogive then all ammo should fit the same.[/QUOTE]

You said it better than I did. The picture I had in my mind is of a round nose bullet and of a target bullet.

So I have a question then. The OP mentions useing a comparator to measure with. Would the comparator match the rifling for diameter or would it be an arbitrary dimension such as with a bullet seating die?
 
Thanks for the input !! A Hornady comparator has different inserts for different diameters of projectiles. A #22 would be for 22 cal, a #24 for 24 cal and so on.
 
Eynhallow said:
Thanks for the input !! A Hornady comparator has different inserts for different diameters of projectiles. A #22 would be for 22 cal, a #24 for 24 cal and so on.
Click to expand...

Thanks for your reply. I do not have a Hornady comparator, maybe I will have to change that. Making your cartridges the same length, from ogive to base would be an idea. It would give you a place to start from.
 
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