BROWNING CHOKE CODES (check on rear of barrel, usually on the left, but, sometimes on the right). ( for an O/U open and check flats)
* Full
*- Improved Modified
** Modified
**- Improved Cylinder
**$ Skeet
*** Cylinder bore
INV Browning Invector choke tube system.
INV. PLUS Browning Invector Plus back-bored barrels Note: Inv and Inv Plus are not interchangeable. http://www.browning.com/customerservice/qna/detail.asp?ID=100 will give you the numerical data.
Your gun was made in 1963. Use the link below to determine choke.
A poly choke is an aftermarket choke. The choke twists to different settings. It should have marks to determine settings around the collar of the choke
GO TO BROWNING WEBSITE AND GET CHOKE SPECIFICATIONS FOR DIFFERENT CHOKES AND MIKE END OF BARRELL
Amount of muzzle constriction
How much muzzle constriction there is.
To determine the choke of a Springfield Model 67 shotgun, you can measure the constriction of the barrel at the muzzle. This is done using a choke gauge or calipers to measure the inside diameter of the barrel at the muzzle and comparing it to the diameter further back. Standard chokes include cylinder, improved cylinder, modified, improved modified, and full, each corresponding to specific constriction measurements. Additionally, you can test the patterning by firing the shotgun at a target and assessing the spread of shot to gauge the choke's effectiveness.
'*' designates full choke (F). '*-' designates improved modified choke (IM). '**' designates modified choke (M). '**-' designates improved cylinder choke (IC). '**$' designates skeet (SK). '***' designates cylinder bore (CYL).
If you mean a choke bored barrel, it designates the amount of constriction a shotgun barrel has.
To determine the choke of an unmarked shotgun barrel, you can use a choke gauge or caliper to measure the diameter of the barrel at the muzzle. Compare this measurement to the diameter of the bore further back in the barrel; if the muzzle is smaller, it indicates a constriction, typically associated with tighter chokes. Alternatively, you can pattern test the shotgun by firing it at a target from a set distance and observing the spread of the shot, which can give you a visual indication of the choke's constriction.
Try browning.com
Cylinder bore- which is no constriction at all.
Depends on how choke markings on the weapon.