Chokes

Freddypip said:

Westley - Agree with you there.

It's interesting that Blaser went to Briley for their chokes for the F3/F16 and there's nothing particularly unusual about them. They are about the same length as the old Beretta Mobil system. Of course they do have coloured bands.

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The Briley flush chokes, like the Teague, or the Manufacturers own flush chokes are identical, apart from the name on the side. I use the extended version for ease, more than anything else. Funnily enough, I use a Beretta choke key because it is light to carry. Oh, and it's cheap !
I'm not really into coloured bands, in fact, being deaf, I'm not really into music of any sort !

Freddypip said:

exact gun whereas Beretta probably do."

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No, they don't.

I am on my second Beretta and the chokes on both worked loose after a few shots hence the use of grease.
If you look at the threads you will see that they are not standard thread forms and this could be why they come loose

Martin - Sounds like I was being way too optimistic !!! If they can't get it right then what hope has somebody else.

Freddypip said:

I'm sure they can measure the thread - they might even know how to measure all of the info required to replicate it - pitch, root, crest & all of the diameters etc. I suspect however that Beretta have changed their (exact) specs over the 20 years the Mobil choke system was used - god knows how many guns over that period. An aftermarket choke has to fit all guns with that system so if they measure various guns and end up with some variance (particularly in root & crest) they have to compromise to ensure the aftermarket choke will fit everything. So to repeat - "I suspect that aftermarket suppliers don't have the exact thread spec for the exact gun whereas Beretta probably do."

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I would put a huge amount of money they have not changed the specs...if the they had it would not be a mobil choke.
Many other manufacturers use these chokes and i have interchanged many and there has never been a problem.
New or 20 years old..it isn't broken so why would they want to change it?

Mobil is just a name at the end of the day. Maybe they haven't changed the specs. Maybe they are exact (which I doubt) or maybe they were always made to wide tolerances (which I suspect) to allow for tool wear, barrel tool variations etc. I just don't know but I struggle to see how the after market crowd can beat the original specs & tolerances etc via retro measurement.

They are used by other makes but having seen them I won't put a Hatsan made choke in any of my Berettas. The Hatsan chokes show what you can get away with.

Totally agree it isn't broken - just use a bit of grease. To me, it's 90% marketing hype - Optima, Optima HP, and now the new ones on the SL2.

Should have added - After 20 years any changes would be for cost reasons - lesser materials, labour, machine quality, reduction in QA, whatever.

I use Briley Chokes most time.

I have used ones from.
Beretta,Benelli, Huglu and various other manufacturers in a variety of guns.
They have all fitted and interchanged fine.
When an after market producer makes Mobil chokes he makes one that fits any model that is described as having Mobil chokes.
The measuremnts they make them from will likely be sourced from Beratta anyhow.
The standard the are made to may differ.