Reloading - when your mag box limits your COAL

What amount of clearance do you use for your cartridge COAL? In other words, regardless of your desired distance to the lands; you always allow a minimum of X thousands under mag box length?
.010" short of mag box length, anymore and you risk giving the cartridge a running start at hitting the front of the box and damaging bullet tips, even plastic tipped bullets in big recoiling cartridges.

Cheers.
 
Case taper between different cartridges that use the same follower change coal in my AR mags (especially in short mag cartridges) for now until I have a better solution?
 
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