Colonial True Size Elite Series Ported Turkey Choke Tubes

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1. .663 Extra Extra FULL Turkey Tube for Baikal SxS (MP-43KH)

   Posted by Robert Melvin on 4th Jan 2018

   Great company, superb quality & they shipped to IRELAND!
   
   I was truly impressed by their very high level of customer service, sorry to say, but in Europe we are just not accustomed to it (not including the UK).
   
   Actually I ordered this choke together with some other Colonial chokes before Christmas for my friend in Ireland who has a 12gauge Baikal MP-43KH Side by Side with exposed hammers (like the Bounty Hunter 2 coach gun in the US, but with the longer 71cm / 28" barrels).
   
   Thanks to the clear technical information on the Colonial Choke and Tool web site, it was possible to make the correct choke selection. As the Baikal shotgun shares the Tru-Choke (Tru-Size) style threads (.795” x 44tpi - teeth per inch) with other gun brands, it is not so straight forward to select a choke. This is because different gun brands use different nominal bore diameters, the Baikal is a 0.725” (18.4mm) diameter (.729 is a more common barrel diameter). That simply means that a Baikal Cylinder choke (with .000 constriction) will have an exit diameter of .725 inch.
   
   Anyway due to this nonconformity, my friend was having difficulties in selecting the correct chokes for lead shot (they don’t seem to use any steel shot in Ireland). So when he choose different brand choke marked as X-Full, that choke naming was actually based upon steel shot patterning and had a .700 exit diameter, which gave him an IM improved modified (British 5/8) when using lead shot (a .025 constriction).
   So a choke on the Baikal having a .705 exit diameter will give a Modified (British 1/2) pattern using lead shot, that means selecting a Colonial choke marked as improved modified which has a .705 (.020 constriction) exit diameter.
   
   My friend tried out all chokes on the pattern board over the festive season and he is totally satisfied with the results and informed me that they are really excellent quality.
   
   Note:
   Although Colonial states "Designed for single barrel shotguns only", this choke fits fine on the Baikal SxS shotgun (the clearance may be less with other shotgun brands).

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