Choke tubes for a Baikal

[870BkWht]

I recently picked up a Baikal 12 gauge. Upon looking on the web, it appears that the threads are compatible with tru choke. I found tubes available from colonial arms, carlsons, and tru choke. I was wondering if anyone else makes a tube for these guns and I also was curious what a good exit diameter would be. I see that Carlsons offers a .670 down to a .640 but I don't have the money to try them all. I plan on shooting longbeards and maybe some heavier than lead down the road. Looking for some suggestions.

Thanks
Ben

[Longshanks]

Pure Gold, Indian Creek and Kicks with make chokes for you in tru-choke. I'm shooting Kicks chokes out of my Tru choke threaded Remngton barrels. (CT-1). Best I have found for lead including Winchester LB's.

[Roost 1]

Get a kicks .655 or .660 with longbeard 5s

[gobblingghost]

I have mp 153 and it has a Sumtoy in it. It will preform I just need a saddle mount to start taking it turkey hunting.