I've had a couple of .410 enfeilds, not impressive with slugs or anything else.
They are heavy and slow as a shotgun, and innacurate with slugs as a "rifle".
The most accurate .410 slug gun I had was a cylinder bore, and the shot pattern with no 6 sufferred for the lack of choke. I would'nt have much faith in the .410 as a dual purpose gun, esp an enfeild.
My choice would be to get a 12 or 20 gauge and a couple of .410 adaptors(skeeters). With a double trigger 12 gauge (sxs or ou) you have a choice of
.410 shotshells for up close or roost shooting,12 or 20 gauge shotshells for longer range and wingshooting, and slugs for anything that walks in Canada.
Now that's a gun that'll do everything(and I'm bringing with me to the mountains next weekend)