Remington Choke Tube Chart - Rem Choke, Pro Bore

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The choke tube table above shows the diameters and constrictions you can expect for choke tubes and shotgun barrels for the Remington 870 and other Remington 12-gauge shotguns compared to common fixed choke shotgun gauges. Remington shotguns have two different choke systems. Some models are compatible with Remington Choke (REM Choke) style threads, while others have Rem Pro Bore style threads. See this guide for identifying REM choke vs Rem pro bore.

Knowing the diameter of a choke tube is important in order to identify choke tube constriction. The tighter the choke tube, the more constriction it has and the less constriction, the more open a choke will be.

Choke sizes are classified by both their measurement (to a thousandth of an inch) and by a special naming system. Choke measurements range from open chokes of around 0.735″ to 0.770″, to more restrictive chokes of around 0.600″ to 0.680″. Choke tubes are also classified by a naming structure that includes (from open to tight) cylinder, skeet, improved skeet, improved cylinder, light modified, modified, improved modified, light full, full, extra full, and turkey.

For choke sizes of other gauges and brands, see this chart.

Remington Choke Size Chart

Choke Size	Diameter (in)
Cylinder	0.727
Skeet	0.722
Improved Skeet	0.717
Improved Cylinder	0.712
Light Modified	0.707
Modified	0.702
Improved Modified	0.697
Light Full	0.692
Full	0.687
Extra Full	0.682

Approximate choke sizes for REM Choke in 12 gauge.

Remington Choke Tube Markings

Markings on choke tubes come in a wide range of variations, but their meaning across the spectrum is largely the same. Manufacturers can use a notching/serration system, color coded, alpha naming scheme, and color banding to indicate the diameter of the choke tube. This is done for quick verification without having to remove the choke from the gun in most cases.

Related – Looking for a NEW choke tube? See the TOP PICKS here!