I know they won't warranty shooting any handloads or chamber changes. I'm sure you will do great with Encore.

Here is picture of Enfield 8GA FH. You can see plastic case
in the port. Box of cases behind, 770 gr and 1050 gr
slugs in front with the 8ga wadcups I use.
Left two slugs are 1050 gr made from 3 oz kiln slugs.
I rounded nose and put in hollow base. Also the
cards and fiber wads used. Slugs are hollowbase, as
it is smooth bore barrel. Ed


[Linked Image]

Ed Hubel