The only example I can give you is the use of a 115 or 124 gr LRN in either a CZ or Browning HP.

Both of these guns have funky barrels or "leades", chambers, whatever. There is no way to use the printed load data of OAL to seat the bullets to fit these guns (using MBC bullets) the bullet is so rounded it jams in the barrel using the "preferred" OAL.

I need to seat them much deeper in order for them to chamber. Doing so I need to reduce or at least use the min powder charge.

If I use a FMJ bullet with more of a pointed profile, all is well.

So to me, it all depends on the guns particular barrel.

OAL does not work well with bullets that have a cannelure as you normally would seat to the goove but most manuals have a "trim to length" which is a fraction shorter and most handgun brass is not trimmed to that length.

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Still Running Against the Wind