The 30-30, and cartridges based off of the 30-30 and .444 were designed for the smaller frame.(a nice trim package). Better trigger too. The Encore is larger and heaver. Designed for higher pressure cartridges. I wouldn't want my 22lr or 22Khornet on an encore platform. Likewise, the 30-30 is perfect for the Contender.
I understand the OP has an Encore frame, and "push came to shove", I would find a custom barrel, properly chambered to eliminate any headspace issues. I don't recommend the prohunter barrels.
