I have been shooting all kinds of Husqvarna rolling blocks for 15 years. The steel used by the Swedes is as good as any used by Remington. For example, I have a commercial Husqvarna No. 4 rolling block in 20 gauge rifle. It uses a 42mm brass case and I load about 80 gr of FFG BP. These were short range "moose guns" that hit like the flat side of an axe swung by a 7 foot Swede!
The "shotgun" actions have been used to build BPCRs such as .45-110 and .45-120 due to the allowance for longer shells. The standard rolling block action will not take longer shells without modifications of the hammer. Please post a pic of the rifle in question. Does it have straight or spiral rifling? Is it the "shotgun" action or rifle action?
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