Who can tell me the difference in Browning Invector Chokes & Invector Plus?

[12Gauge]

Can someone please tell me the difference in a Browning Invector Choke and an Invector Plus?  I realize they are two totally different chokes, but how do you know which one fits your gun?  Is the age of gun that determines this?  I never realized they had two different kinds.  Thanks for your help!!

[Ratltrap]

Invector Plus tubes are longer. The barrel will be stamped "Invector Plus" if that is the tubes it requires.

[Graybeard]

Yes to some extent age of gun determines.

Standard Invector choke tubes are the same as the old original Winchester tubes. They are much shorter than the Invector Plus which are now the standard for 12 and 20 ga Browning guns. I'm not sure when the switch was made but if your gun was made in the last ten years it most likely has the IP not standard older version.

If you pull out a tube and take a look it will be very obvious to you which you have.

[steveus]

Nobody has given you the answer you need yet.  The Invector Plus is for Browning and Winchester shotguns which have back-bored,  or over-bored barrels. ( larger diameter) The regular Invector is the normal-for-guage bore diameter. Examples, the Browning A-5 is Invector, while the newer Browning Gold and Winchester Super X-2 is Invector Plus.