Can anyone tell the best rifled choke tubes I can buy?I am going rifled for this Deer season until I can find a suitable action for my rifled slug gun conversion ? Also looking for a suitable FEG Hungary or Spanish double..But for I think with rifled chokes,after read Ron Vella post..

if you are talking about internally threading a Side by Side shotgun--
the first consideration will be-

barrel thickness -
IE: is there enough thickness to thread for HEAVY WALLED Rifled Chokes-

(though, some may make a thin wall rifled choke that I am unaware of)

IF they are thick enough--
then you can decide whose
rifled chokes you want
( there are many thread pattern and brands to choose from)

then you get to playing with your regulation--

Suggestion:
get the gun and fire some slugs through it BEFORE you start down the"choke" road--

you may be surprised-
for example-
am inexpensive 26" Eibar 20ga 3" with IC/M barrels stacks Brennekes in a 8" circle at 75yds --
sometimes you get lucky-- and find a Brand of slug that works right off the bat

Good advice from Dugga Boy.

Thank you for your posting..the SXS is the màde Biakal,so would you have any advice for this cheap SXS?This would be the companies that would the rifled suitable for this shotgun?

IIRC, AT ONE TIME bAIKAL SOLD RIFLED INSERTS FOR THEIR SHOTGUNS.
Sorry for all caps - new computer.

Why spend good money on a Baikal??

Because it is the Yugo of double guns!