Get the factory, send it to a Gunsmith, email me for the name of a very good one, have him cut and crown to your desired length. As far as using 100-150gr, I used 150 one time and learned my lesson. A lot of muzzle blast, recoil, and unburned powder flash. In my 26" barrel, 120gr works wonderfully. If you are set on 22.5" I would recommend 100gr.
Accuracy between the two should be no different. I have seen factory outshoot custom and vice versa. In my opinion, custom guns should shoot more loads accurate whereas a factory may only shoot one or two loads well.
On the Encore barrels, the Quick Load Area can be off center and need a cut and recrown anyway.
Feel free to email me,
Kyle
topboss8@yahoo.com