SW---Just depends on how bad you want the older gun and what it would be worth having them all the same. I personally like the older BT's but don't own one. I wouldn't think it would be a major nor expensive job if its possible. Hell Carlsons will thread a barrel and include a (3) choke set for less than $150. I'd call Wright's if it were me.---Matt
Even if such a conversion is possible, it isn't a viable solution. See the following note to grntitan for an explanation...
You are missing Wayne's point.
Assume someone had a 0.729" standard Invector barrel re-threaded to accept 0.742" Invector Plus chokes. The relationship of the relatively small barrel diameter as compared to the relatively large diameter of Invector Plus chokes is all wrong.
The amount of constriction for the Plus chokes wouldn't be correct because you're losing 13/1000" of choke from the gitgo.
For example, a full choke Plus tube measures about 0.708". If you could put it a standard Invector barrel at 0.729 you would have 21/1000" choke. Your full choke Plus tube would in reality be a modified.