If the gun has a Full choke barrel, as most do, you could bulge the barrel just behind the choke. Never reload steel shot into any lead only shotcup, they are not thick enough or tough enough, and barrel damage would most likely occurr. Use steel shot components only, when reloading steel. I wouldn't consider shooting steel in an original 97. If you choose to use lead, even for "one time only" you are violating federal and state game laws, and if caught, the penalty can be quite expensive, I'm told. Probably more than the cost of the legal ammo or a new shotgun that is steel rated. The last point to consider is that modern loads operate at considerably higher pressures than shells generated in your guns era.Will a few shots of Win xpert game/Target do a lot of harm? Should I reload some with steel shot in a plastic tube? I don't want to damage the old gun made in 1898.