Yes
Check the receiver and barrel
Recommend you find a gunsmith and ask for assistance.
Although both are interchangeable, a true Sweet 16 barrel will have three holes drilled through the barrel band. This was one of the ways Browning lightened the barrel. The rib will also be a smidge thinner than on a regular barrel.
You will have to ask Browning.
Try e-gunparts.com or MidWest Gun Works
Contact Browning.
No
You need a trained Browning gunsmith
It will be marked on the barrel. The barrel is marked "Made in Portugal".
The Browning 2007 Product Catalog states that the A-Boltchambered for 25WSSM with a 22" barrel has a 1 in 10" rate of twist.
No
It is possible