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Let’s talk traditional levergun pressures. Top end for a 30-30 is at about 40,000 PSI. The 44mag top end loads see about 40 to 45,000 psi. For the other pistol cal leverguns that’s the top end limit. But Rossi chambers their 92’s in 454 Casull. The Casull ammo can see upwards of 60,000. That's 308 and 30-06 pressures. Not even Marlins 336/95 action will handle those pressures. The Rossi 92 actions are doing fine at those levels. The reason the 92 will handle this pressure is because of two things inherent in it's design. First is the twin locking bolts. The other leverguns like the marlins and the 94 win have single locking bolts that come up behind the breech bolt and are turned flat with the thin side toward the breech bolt. Under load it flexes much like a 2x4 used as a pry bar does when you use the flat wide side down. The 92 has two locking bolts turned to the narrow side so the wide portion doesn't flex. Next is the angle of engagement of the two. The single locking bolt gun has to have the locking bolt laid back at a much more severe angle in relationship to the breech bolt. If it were more perpendicular the action would seize up when fired. So, once the pressured reach the 50,000 point or so, the action tries to fly open. The 92 on the other hand with its twin locking bolts which disburses the pressure over more area, are positioned more toward the perpendicular which helps to prevent the action from trying to fly open. On a side note, Freedom Arms, the folks that deleloped the 454 casull did some testing using a Marlin 336/95 style action chambered in 454 Casull. After a few rounds it actually pushed the breech bolt over the locking bolt out the top of the receiver. They probably had the lever tied so it wouldn't fly open. The Winchester 86 is a strong action too, but I think the 92 is stronger because it has a frame web just behind and below the locking bolts that ties the two side of the receiver together. The 86 doesn't have that web. This is my 24" octagon converted from 45lc to 454 Casull. I built this one because the round barrel carbines are just too light. The gun will do 2 MOA at 200 yds. But, I can't. I have a friend that has good eyes and a tree stump shoulder that can do it with full power Casull ammo. For me that just too punishing. I have it sighted in at 75 yds with Buffalo bore's +P 45lc's