.38, .44 Special and any cartridges that were based on black powder and switched to smokeless have ample volume in their cases to the point that they are VERY flexible in COL. As long as you aren't near max load you can set the bullets anywhere from the ogive to the base of the bullet, as long as it doesn't block the cylinder from turning.

That smidge off that you have won't vary the loads one bit. And when in doubt, crimp in the cannelure. Whoever designed the bullet had all of that in mind so any commercially available bullet can be set in the cannelure.

Now with high pressure cartridges in a small case, it's a different story. In near max loads the depth is critical because deeper setting will raise the pressure quickly. This is usually a few thousandths of an inch. You can set the bullet out extra long because that lowers the pressure just as drastically.

No, you do not need to pull those bullets.

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