DocRob, I own a Miroku Winchester 1886 ELW and my brother owns a Browning 1886 saddle carbine like yours. Like you, we've found that these guns are very short throated. I bought a throating reamer from Brownells and lengthened the throat on mine .075" with no effect on accuracy. The biggest farce was taking the gun apart to do the reaming.I must mention that there are several bullets made for Marlin's 1995 that will not chamber as well in the 1886, Cast Performances 440 gr. is one of them. I can live with what I got, besides I just received Marshal's new 425gr. slug the other day and will start playing with it. Marshal says they will chamber in the 1886 and I have absolutely no reason to doubt him. Hey, this project has been alot of fun and I have what I always wanted and then some. Hope this helps.