pointon242 Posted May 12, 2014 Report Share Posted May 12, 2014 Bought a used urika 1 at the weekend from a local delear. Great condition and came with the hard case, manual and 4 chokes. Heres the confusing part, the manual is for the xtrema 2 and states it uses optima plus chokes. I have 3 that are marked optima plus in full, improved modified and cylinder. Now theres also what looks like a mobil choke in improved modified, this is going off beretta choke comparison pics on google, and judging by those pictures the optima plus is identical to the mobil apart from the flush optima tubes arent really flush fitting. All the chokes fit the barrel, does anyone know if the optima plus and mobil are interchangable? Quote Link to comment Share on other sites More sharing options...
Dekers Posted May 13, 2014 Report Share Posted May 13, 2014 Bought a used urika 1 at the weekend from a local delear. Great condition and came with the hard case, manual and 4 chokes. Heres the confusing part, the manual is for the xtrema 2 and states it uses optima plus chokes. I have 3 that are marked optima plus in full, improved modified and cylinder. Now theres also what looks like a mobil choke in improved modified, this is going off beretta choke comparison pics on google, and judging by those pictures the optima plus is identical to the mobil apart from the flush optima tubes arent really flush fitting. All the chokes fit the barrel, does anyone know if the optima plus and mobil are interchangable? The Urika 391 uses Optima chokes. They are longer than Mobil, they can't both fit the same barrel. Quote Link to comment Share on other sites More sharing options...
fenboy Posted May 13, 2014 Report Share Posted May 13, 2014 The Urika 391 uses Optima chokes. They are longer than Mobil, they can't both fit the same barrel. My 391 was fitted with mobil Quote Link to comment Share on other sites More sharing options...
Dekers Posted May 13, 2014 Report Share Posted May 13, 2014 (edited) My 391 was fitted with mobil I stand corrected if that is the case, I have an early 391 Urika and mine is Optima, I was not aware they made any with mobil, my 303 was mobil and I believe the 390 was mobil, my understanding was it changed to optima and optima plus on the 391 Urika . Whichever way you want to look at it they are not directly interchangeable and do not look identical, so I'm struggling to understand how both apparently fit the OP's barrel! As a matter of interest does anyone else have a 391 Urika with mobil chokes? Edited May 13, 2014 by Dekers Quote Link to comment Share on other sites More sharing options...
safc1973 Posted May 13, 2014 Report Share Posted May 13, 2014 My 391 was fitted with mobil As is mine. Quote Link to comment Share on other sites More sharing options...
vmobiler1 Posted May 13, 2014 Report Share Posted May 13, 2014 I had a 391, with Optima chokes. Quote Link to comment Share on other sites More sharing options...
CharlesP Posted May 13, 2014 Report Share Posted May 13, 2014 I have a 20 bore Urika 1 - it has mobil chokes. Quote Link to comment Share on other sites More sharing options...
provarmint Posted May 13, 2014 Report Share Posted May 13, 2014 Mine has Mobil. Quote Link to comment Share on other sites More sharing options...
humperdingle Posted May 13, 2014 Report Share Posted May 13, 2014 My 391 used Mobil chokes. Quote Link to comment Share on other sites More sharing options...
pointon242 Posted May 13, 2014 Author Report Share Posted May 13, 2014 (edited) Its probably just me having a blonde moment lol. These are what i have, the ones marked optima plus are on the right Edited May 13, 2014 by pointon242 Quote Link to comment Share on other sites More sharing options...
Westley Posted May 13, 2014 Report Share Posted May 13, 2014 I think that you may find that the 391 field model has the standard mobil chokes whilst the 391 'sporter' has the Optima chokes. I have seen and owned both variations. Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 13, 2014 Report Share Posted May 13, 2014 My 3 yr old Urika has Optima Plus chokes. They are longer than the standard Optima ones I think. Quote Link to comment Share on other sites More sharing options...
Dekers Posted May 13, 2014 Report Share Posted May 13, 2014 I think that you may find that the 391 field model has the standard mobil chokes whilst the 391 'sporter' has the Optima chokes. I have seen and owned both variations. I think this is getting confusing, mine is a Game/field gun and has Optima Plus! Quote Link to comment Share on other sites More sharing options...
turbo33 Posted May 13, 2014 Report Share Posted May 13, 2014 I think this is getting confusing, mine is a Game/field gun and has Optima Plus! So was mine with Optima plus Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 13, 2014 Report Share Posted May 13, 2014 I think this is getting confusing, mine is a Game/field gun and has Optima Plus! Mine is a Urika Light in 12 gauge with Optima Plus. My 20 gauge Teknys had standard Optima chokes but it was a lot older. Quote Link to comment Share on other sites More sharing options...
pointon242 Posted May 13, 2014 Author Report Share Posted May 13, 2014 (edited) After finding this thread: http://www.shotgunworld.com/bbs/viewtopic.php?t=112042&start=15 It appears that the optima plus do infact fit in the mobil barrels as is seen in the 5th post on that page but they dont sit flush, they look like extended chokes and obviously arent designed for the bore of the mobil barrels. Good job i only used the mobil choke in the gun on sunday Edited May 13, 2014 by pointon242 Quote Link to comment Share on other sites More sharing options...
Westward Posted May 13, 2014 Report Share Posted May 13, 2014 Mobil chokes have the same threading as Optima Plus and will screw in but a Mobil ¼ choke is 10 thou constriction from the usual Mobil bore size of .726. Optima bore size is .732 so it will be more like ½ choke in the Optima Plus barrel. Obviously the opposite is the case when putting Optina Plus chokes into a Mobil barrel. Either way it doesn't strike me as a good idea and I wouldn't fit incorrect chokes into a shotgun. Beretta O/Us are stamped on the barrels with the bore type and I'd recommend looking for the marks, if none then drop in to your nearest RFD and have the bore measured. Quote Link to comment Share on other sites More sharing options...
fenboy Posted May 13, 2014 Report Share Posted May 13, 2014 I think that you may find that the 391 field model has the standard mobil chokes whilst the 391 'sporter' has the Optima chokes. I have seen and owned both variations. Nope , mine was a sporter and had mobil Quote Link to comment Share on other sites More sharing options...
safc1973 Posted May 13, 2014 Report Share Posted May 13, 2014 Nope , mine was a sporter and had mobil Ditto Quote Link to comment Share on other sites More sharing options...
Dave T Posted May 14, 2014 Report Share Posted May 14, 2014 Ditto Mine's a trap model, also mobil Quote Link to comment Share on other sites More sharing options...
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