I have what appears to be a Winchester Model 54 originally chambered for 22 Swift but which has been rechambered for 222 Winchester. I can't tell what variation it is, as there is no checkering but the also no finger groove on the forestock. My question is can anyone help me with maintenance for this gun? There are some issues with the action, and I haven't been able to find a parts diagram specific enough to help. If anyone knows anything about the Model 54 or owns one and can help me, I'd greatly appreciate it.