By specs do you mean velocity or measurements or what?
Huntington says it can send a 420 gr at just over 1400fps. I think it's right about even with the .500 Linebaugh, maybe a tad lower on the totem than the .500 Wyoming Express. I think the Wyoming Express (~50,000psi) is loaded to higher pressure than either the Linebaugh (~35,000psi) or the .500 JRH (unsure). I think that is mainly because the Wyoming is only chambered in FA guns, and they use a very high grade steel and are probably stronger than the Linebaugh/Bowen/Huntington 5-shot converted Bisleys.
You'd have to split hairs to ever see a real-world difference, but I think even with the added PSI and consequent velocity, the Wyoming might not be at the top of the heap as expected, namely because the FA83 has a cylinder a little on the short side which limits how heavy you can go (for instance 525gr loads have recently gained some popularity for the Linebaugh). 440gr is the heaviest I see on Hodgdon's WE data, and if I had to guess, it's probably about as heavy as you can reasonably cram into the FA83 cylinder.
Huntington says it can send a 420 gr at just over 1400fps. I think it's right about even with the .500 Linebaugh, maybe a tad lower on the totem than the .500 Wyoming Express. I think the Wyoming Express (~50,000psi) is loaded to higher pressure than either the Linebaugh (~35,000psi) or the .500 JRH (unsure). I think that is mainly because the Wyoming is only chambered in FA guns, and they use a very high grade steel and are probably stronger than the Linebaugh/Bowen/Huntington 5-shot converted Bisleys.
You'd have to split hairs to ever see a real-world difference, but I think even with the added PSI and consequent velocity, the Wyoming might not be at the top of the heap as expected, namely because the FA83 has a cylinder a little on the short side which limits how heavy you can go (for instance 525gr loads have recently gained some popularity for the Linebaugh). 440gr is the heaviest I see on Hodgdon's WE data, and if I had to guess, it's probably about as heavy as you can reasonably cram into the FA83 cylinder.