Vang Comp wait times

[DProm]

Something is off with your dates. But if it's only 30 days for a port job I may send them my barrel...

Crap thanks for catching that! Sorry I was half asleep waking up from a 22hr shift so I was sleepy but excited for the barrel! Corrected the date on when it was shipped to vangcomp!

[shovelon]

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Wow! That is a lot of porting holes. Like 60? Does the lengthened forcing cone lead right into the ports? Is there a reduction of FPS?

[hermosabeach]

Hans said that everything likes to fart!

When a wad leaves the muzzle, the gases move past the wad and shot at the muzzle.

The gas blowing last the wad can be inconsistent and move the wad and shot slightly.

This opens up the pattern and does it differently each time.

The ports allow the shotgun to bleed gasses out of the ports so the remaining gas does not disturb the wad and shot as it leaves the muzzle.



Mind you I heard this back in the late 90s so I might not have it spot on.


Long way of explaining that the ports on a shorter barrel shotgun (14-19") serve a different purpose than the ports on a rifle.

Rifle is high pressure and bullet is stabilized by spin so ports and brakes limit rise and recoil.



Ports on shotgun do more for a stable wad and shot column leaving the barrel than they do for muzzle rise.

[hermosabeach]

Velocity

Yes back boring will cause a very small drop in fps


It would be nice to have some real world testing but it probably less than 50 FPS- before Vang and after.

[hermosabeach]

Randy

Did you ever chrono a load before and after?

[hermosabeach]

DIY porting jig

https://www.brownells.com/tools-cleaning/gun-tools/shotgun-tools/barrel-porting-jig/

[shovelon]

So backboring reduces recoil, shot deformation, and velocity. https://www.chuckhawks.com/backboring_does_not_work.htm

The reasoning in the upper article makes sense.

[DProm]

Finally got my 590 back from cerakoting and put together. Took it out yesterday for some clay and target shooting.

First initial impressions was just... wow. I'm loving this more than the first day I brought it home and the first time I shot it. Definitely a difference! Don't ask me about technical specs stuff or chrono.... I just like to shoot that's all.

[enorbit3]

Looking good!!

[W.R.Buchanan]

So backboring reduces recoil, shot deformation, and velocity. https://www.chuckhawks.com/backboring_does_not_work.htm

The reasoning in the upper article makes sense.

However it is not the end all. Back Boring doesn't necessarily Reduce Velocity.

In fact it reduces the amount of Drag on the Shot Cup and Payload which increases Velocity.

The lengthened Forcing Cone increases the time it takes to transition from the chamber to the bore, lengthening the Impulse time. Perceived Recoil is reduced

My new Citori CXS32 has a .740 bore, and I have to run Cyl Bore chokes to get Skeet Patterns. The barrels on that gun are not ported, but I wish they were.

The Porting relieves the pressure behind the payload so it effectively "Coasts" thru the choke, which causes less Shot Deformation and also reduces Recoil.

All of these things together make the gun more pleasurable to shoot.

I shot Skeet yesterday and every shotgun there had porting by my .410

Didn't note any elevated noise from those ported barrels.

Then, I went over to the Rifle Line and did notice the effects of muzzle brakes!

Randy

[SDM44]

I sent in my 870 barrel to have the VCS barrel mod and ports done to it, and just received it back completed in less than 2 weeks

I shipped my barrel out on 3/17 and it arrived on 3/20 (slowass USPS from LA to Vegas). They emailed me on 3/24 saying they received it and added that note to my order. Just a few days later, they completed the work and I received a tracking number on 3/28. UPS delivered my barrel today on 3/29.

I've been wanting to do this for a long time but just keep forgetting about it, and figured now was a good time and I was prepared to wait a couple of months for my barrel to get done. To my surprise, it was done and back in my hands in about 10 days, so kudos to Vang Comp.

[W.R.Buchanan]

IMG_2378.jpg I sent my latest A5 barrel over to them on Feb 24. Got it back on March 15. I only got all the internal work done, no Ports. Haven't shot it yet due to Weather around here.

[Ari_d_sparki]

IMG_2378.jpg I sent my latest A5 barrel over to them on Feb 24. Got it back on March 15. I only got all the internal work done, no Ports. Haven't shot it yet due to Weather around here.

Would the ports reduce the reliability of an auto?
Last time I shot an auto like an A5 it was punishing compared to my 870 VCS.

[Sheepdog1968]

I’ve come to the conclusion that if you become a solid gunsmith, you can pretty much charge what you want/need to live a decent life. All 4 of the gun smiths I used to use in the San Francisco Bay Area are either now dead or retired. In fact, I’d go so far as to say, if that were my career path, I would charge an hourly price similar to a mechanic. If folks find that too steep, that likely would work in my favor as still probably enough work without too much lead time on new jobs. Also, I would only be open to the public one or two days a week so that I could spend most of my time actually gunsmithing without interrruption to get in the billable hours. My two cents. I also feel the same about places that do traditional furniture repair.

[W.R.Buchanan]

after Shooting the A5 extensively at the Thunder Stick Summit I am glad that I didn't get the Ports. I had problems with light loads < 1100 fps not fully cycling the Action and causing Stove Pipes. The Federal Birdshot at 1300 fps ran OK and my Reloads ran OK. I think part of this was the Hulls or the Crimps on the cheap shells. More shooting required but Cody Warned me that with the 20" bbl. there might not be enough Recoil to get the barrel all the way to the rear so the Ejector could do it's job properly.
I can get the ports put in it any time I want. so it's not big deal.

Randy