I think Al Story of the Borchardt Rifle Company N. of Silver City, NM
may still offer his slight receiver bolt/trigger alteration allowing an adjustable trigger.
This rifle has a good bore, age considered.
The early 1900s and somewhat later produced the worst mercuric primers,
which did considerable bore damage if an initial water/oil based bore cleaner was not utilized. Then
followed by a high qualty gun oil lightly coating the bore.