Hi Matt,
I pulled that information on the Fraser version of the 6.5 (.256 Fraser Flanged) from the book “British Sporting Rifle Cartridges” by Bill Fleming.
DWM was very specific with different case numbers for the Dutch and Romanian versions of the 6.5x53R.

Maybe some Romanian en-block clips allowed for the bigger rim thickness compared to the Dutch ones? Out of the clips that I have, most are the M95 type Dutch clips (larger rectangular window). I have just one clip that is said to be the M92/93 Romanian made (small oval lozenge shaped window) and it surely does seem that there is more fore/aft “play” in the rim recess of that clip with .060” thick rim ammo. Who knows?

There is at least one Fraser Steyr Mannlicher in 6.5x53R: http://www.sitemason.com/page/bculAk
- Mike