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The claw is made to work with the 90 degree bolt lift, but it could be done with a 60 degree lift as well if someone wanted to go through the trouble of machining an action that way.
Another way to get 3 lugs is to take a standard Mauser 98 system and lap the bolt forward lug and abutments back until the 3rd "safety lug" comes into bearing. This produces a super strong action. I have done it when I have made 375s 404s and some 300 H&Hs from GEW 98 Mausers because you need to cut back the lower abutment to make the long cartridges work. So that makes the lower abutment weaker.

To compensate I lap the whole bolt back until I make a 3 lug locking action and the 3rd safety lug is locked into a super strong abutment, and it's not split like the left lug on a Mauser. This means the 3rd lug is strong as the right lug, but the abutment it locks into is far stronger than the right lug's abutment. By doing this you make the action far stronger than it was even before you modified it at all.

The easiest way to do the work is to anneal the receiver first to make it cut faster. I make a strong spring and plunger to fit into an old rusted barrel that gives pressure against the bolt face. Put 120 grit lapping compound into the abutment recesses and close the bolt against the spring pressure. Now raise and lower the bolt handle about 80 degree for as long as it takes to lap the forward lug abutments back so the rear lugs bears too. Add a bit of oil to it about every 10 minutes and lap it back. When all 3 lugs come to bear evenly re-harden the receiver.

Works great!

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