Used shotguns with long barrels are readily accessible in most areas. A 28″ vent rib shotgun is good for the duck blind or goose hunting, yet too long for many other hunting and sporting applications. In this post, we will certainly look at exactly how a vent rib shotgun barrel is cut and crowned (a screw in choke device will be installed as well).

You are watching: What is a vent rib barrel

The following items to be ordered from Brownells:

All lathe work is carried out on a Grizzly gunsmith’s lathe.

The contents of chathamtownfc.net are created for informational functions only and should be performed by competent gunsmiths only. chathamtownfc.net and its authors, do not assume any responsibility, straight or indirectly because that the safety of the readers attempting to follow any kind of instructions or perform any kind of of the jobs shown, or the use or misuse of any kind of information had herein, ~ above this website.

The barrel supplied in this article is a Remington to express 28″ vent rib barrel.

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" data-medium-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?fit=300%2C200&ssl=1" data-large-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134326" src="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?resize=300%2C200&ssl=1" alt="Cutting a vent rib barrel requires a little much more planning than a level barrel. The new crown needs to soil on one of the rib bases. If not, the unsupported rib would bend and also the perfect product would certainly look awful. I"d prefer this barrel to be approximately 18" long. I"ll cut the barrel a small over 18.5" for this reason I can have the muzzle aligned v a rib base. " width="300" height="200" srcset="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?resize=300%2C200&ssl=1 300w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?resize=1024%2C682&ssl=1 1024w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-measuring.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />Cutting a vent rib barrel calls for a little more planning 보다 a plain barrel. The brand-new crown demands to soil on among the rib bases. If not, the unsupported rib will bend and the perfect product would look awful. I’d like this barrel to be about 18″ long. I’ll cut the barrel a small over 18.5″ so I deserve to have the muzzle aligned through a rib base.
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" data-medium-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?fit=300%2C200&ssl=1" data-large-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134324" src="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?resize=300%2C200&ssl=1" alt="Note the difference in thickness in between both side of the barrel. In this situation the boring wasn"t focused in the barrel. The wall on the ideal side that the photo is around .020" thicker 보다 the wall on the left side. " width="300" height="200" srcset="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?resize=300%2C200&ssl=1 300w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?resize=1024%2C682&ssl=1 1024w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-note-difference-in-wall-thickness.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />Note the difference in thickness in between both political parties of the barrel. In this case the bore wasn’t focused in the barrel. The wall surface on the right side of the photo is about .020″ thicker than the wall on the left side.Prior to installation a Rem throttle system, the barrel wall thickness needs to be evaluate to make sure it is special enough. This is especially critical in cases such as this where the bore isn’t centered in the barrel.

More details on identify if a barrel wall surface is heavy enough for screw in throttle tubes have the right to be discovered in Choke tube installation and Removing a solved choke native a shotgun barrel and installing a choke tube system. Additionally, Brownells provides good information on measuring for screw-in choke tubes here.

The high-speed steel reamer used right here will not cut a chrome lined barrel (which isn’t a trouble with a Remington refer barrel). If girlfriend think a barrel is chrome lined, see if that takes cold blue. If it does, it no lined. If it no it most most likely is and you’ll need to remove the chrome lining before machining.

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" data-medium-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?fit=200%2C300&ssl=1" data-large-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?fit=682%2C1024&ssl=1" loading="lazy" class="size-medium wp-image-2133443" src="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?resize=200%2C300&ssl=1" alt="I"ll it is in installing interchangeable choke tube in the barrel. In this case the Rem choking style. This is a Rem choking reamer do by Dave Manson. A bronze interchangeable interchangeable pilot guarantee it cut true come the bore. " width="200" height="300" srcset="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?resize=200%2C300&ssl=1 200w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?resize=682%2C1024&ssl=1 682w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/mossberg-500-choke-reamer.jpg?w=1536&ssl=1 1536w" sizes="(max-width: 200px) 100vw, 200px" data-recalc-dims="1" />This is a Rem choke reamer made by Dave Manson. A bronze interchangeable interchangeable pilot ensures it cuts true come the bore.
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" data-medium-file="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?fit=300%2C200&ssl=1" data-large-file="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134322" src="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?resize=300%2C200&ssl=1" alt="The lathe is operation at 70 RPM, the slowest speed on this lathe and slowly fed v plenty of cutting oil. The reamer is generally removed, cleaned and lubricated. Once the reamer it s okay to its full depth, the cutter squares the muzzle. This top edge that the muzzle need to be cut back to align v the vent rib base as shown in the photograph above. " width="300" height="200" srcset="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?resize=300%2C200&ssl=1 300w, https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?resize=1024%2C682&ssl=1 1024w, https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-reamer-at-depth.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />The lathe is operation at 70 RPM, the slowest rate on this lathe and also slowly fed with plenty of cutting oil. The reamer is generally removed, cleaned and lubricated. When the reamer gets to its complete depth, the cutter squares the muzzle. The top edge the the muzzle must be cut ago to align with the vent rib basic as shown in the picture above.
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" data-medium-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?fit=200%2C300&ssl=1" data-large-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?fit=682%2C1024&ssl=1" loading="lazy" class="size-medium wp-image-2134320" src="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?resize=200%2C300&ssl=1" alt="The barrel is secured vertically in a Multi-Vise through padded jaws. The lubricated tap is provided to reduced the threads because that the choke tube. " width="200" height="300" srcset="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?resize=200%2C300&ssl=1 200w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?resize=682%2C1024&ssl=1 682w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-cutting-threads.jpg?w=1536&ssl=1 1536w" sizes="(max-width: 200px) 100vw, 200px" data-recalc-dims="1" />The barrel is secured vertically in a Multi-Vise through padded jaws. The lubricated madness is supplied to cut the threads because that the choking tube.
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" data-medium-file="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?fit=300%2C200&ssl=1" data-large-file="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134318" src="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?resize=300%2C200&ssl=1" alt="The barrel is as soon as again placed vertically. A large document is supplied to remove the bulk the excess rib. " width="300" height="200" srcset="https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?resize=300%2C200&ssl=1 300w, https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?resize=1024%2C682&ssl=1 1024w, https://i0.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-file.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />The barrel is once again placed vertically. A large paper is provided to remove the majority of the overfill rib.
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" data-medium-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?fit=300%2C200&ssl=1" data-large-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134315" src="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?resize=300%2C200&ssl=1" alt="The barrel will certainly be drilled and tapped because that a 6-48 bead. The barrel is set in the mill vise ~ above a collection of parallels. " width="300" height="200" srcset="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?resize=300%2C200&ssl=1 300w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?resize=1024%2C682&ssl=1 1024w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-barrel-in-vise.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />The barrel will certainly be drilled and tapped for a 6-48 bead. The barrel is collection in the mill vise on a collection of parallels. Before placing the barrel in the mill the choke pipe is removed.
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" data-medium-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?fit=300%2C200&ssl=1" data-large-file="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134314" src="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?resize=300%2C200&ssl=1" alt="An leaf finder is offered to situated the center and also front sheet of the rib. " width="300" height="200" srcset="https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?resize=300%2C200&ssl=1 300w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?resize=1024%2C682&ssl=1 1024w, https://i2.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-locating-center-of-rib.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />An leaf finder is offered to located the center and also front sheet of the rib.Shotgun beads are set up in both blind and also through-type holes. In this case, over there is ample material for a remote hole installation. However, due to the fact that this total is equipped through choke tubes, I chose to download the bead sight v a through hole because it will certainly be spanned by the choke (I avoid blind holes whenever ns can).

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" data-medium-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?fit=300%2C200&ssl=1" data-large-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?fit=1024%2C682&ssl=1" loading="lazy" class="size-medium wp-image-2134313" src="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?resize=300%2C200&ssl=1" alt="A facility drill is used to situated the bead sight." width="300" height="200" srcset="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?resize=300%2C200&ssl=1 300w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?resize=1024%2C682&ssl=1 1024w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-centerdrilling.jpg?w=2000&ssl=1 2000w" sizes="(max-width: 300px) 100vw, 300px" data-recalc-dims="1" />A facility drill is offered to spot the hole.
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" data-medium-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?fit=200%2C300&ssl=1" data-large-file="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?fit=682%2C1024&ssl=1" loading="lazy" class="size-medium wp-image-2134311" src="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?resize=200%2C300&ssl=1" alt="The insanity is secured in in a insanity handle and also aligned end the hole v a spring invited guide. " width="200" height="300" srcset="https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?resize=200%2C300&ssl=1 200w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?resize=682%2C1024&ssl=1 682w, https://i1.wp.com/chathamtownfc.net/wp-content/uploads/2014/11/cut-and-crown-vent-rib-barrel-6-48-tap.jpg?w=1536&ssl=1 1536w" sizes="(max-width: 200px) 100vw, 200px" data-recalc-dims="1" />The tap is secured in in a insanity handle and also aligned over the hole with a spring invited guide.

See more: If Two Is Company And Three Is A Crowd, What Are Four And Five?

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