Porting barrels

[Mellonhead]

I am going to experiment on porting a Desert Eagle barrel. All the videos that i have been watching pour lead into the end of the barrel to reduce burrs. Why not just drill or mill into the bore and hone out the burrs afterwards? Is there something I am not thinking about? I could even get in there with a deburring tool and not touch the bore, if necessary.

[crbutler]

Because if you hone the barrel, you will damage the concentricity of the bore. The idea is to put the porting in with the least amount of damage to the rifling and the bore.

That said I have no idea how MUCH accuracy that one would lose doing what you are suggesting.

I think some use EDM and some use lasers commercially to avoid this issue without the lead.

[RJWesleyIII]

I sent my barrel back to desert eagle and they attached their muzzle brake. Did a nice job and it work and looks great.



Sent from my iPhone 5 using Tapatalk

[Seismic Sam]

This sounds like the home project from hell in the making. Particularly when you can just buy the brake and have them put it on for you, or send the barrel to magna-port and have them do it. The brake costs $300 installed. Magnaport will probably be less. And as far as honing, crbutler is on the money about the honing. The DE50 has polygonal rifling, so any metal removal from the barrel will screw up the trueness of the barrel, so this isn't like buffing down the rough spots on a barrel with traditional rifling.

[Mellonhead]

Thanks for the input guys;I have a bolt on muzzle brake also. Just curious if could get the same results with an integrated brake rather than have an extra 1.25" added on to the end of an already large pistol. luckily enough I have a couple extra barrels to experiment with, I will check back and let you know how it turned out. On the first barrel I will be looking function over accuracy, so I will probably use a dremel and a stone-depending on the size of the burrs.

[FJ540]

Drill a pilot hole, then follow it with the end mill in the right size you want. Burr will be minimal. Use a mill to do this so it doesn't look like you were drunk aligning the holes.

What are their barrels made of? Are they chrome lined or nitrided?

[Seismic Sam]

Here you go:



If you go to the Mag Research Q&A page, they even recommend Magna-port as the way to add a brake to their guns. There's no way you can equal their quality and precision, so the question you have to ask yourself is whether saving money for something inferior which may not look quite right is really worth it. For a $1200+ gun. that's really hard to justify. For a Mosin, who gives a s**t, but for a DE??

[FJ540]

That's definitely sinker EDM, and you're not going to replicate that with a mill very easily either.

[Mellonhead]

Drill a pilot hole, then follow it with the end mill in the right size you want. Burr will be minimal. Use a mill to do this so it doesn't look like you were drunk aligning the holes.

What are their barrels made of? Are they chrome lined or nitrided?

It looks like FJ540 is thinking a little closer to my plan. After drawing it out I am going put it on a mill and drill out a series of 6- .120" offset holes on each side. Then follow those with a 1/8 endmill to reduce burrs. The barrel is made out of 4140 chrome-moly steel (26-30RC) and is not chrome lined or plated, so there should be no machining issues. I also have access to a to an EDM sinker, but going to try putting it on the mill first because there will be no out of pocket expenses. I will post pictures to show how it turns out, hopefully the end of the end of the barrel will be intact after shooting.

[FJ540]

They might have wired those too. The funky edges made me think sinker but it could just be the photo.

Go smaller than .120 if you want to finish at .125. Drill bits walk, and usually drill over sized holes. I'd personally drill at under .100 for the pilot.

[qualcorp]

Here you go:



If you go to the Mag Research Q&A page, they even recommend Magna-port as the way to add a brake to their guns. There's no way you can equal their quality and precision, so the question you have to ask yourself is whether saving money for something inferior which may not look quite right is really worth it. For a $1200+ gun. that's really hard to justify. For a Mosin, who gives a s**t, but for a DE??

Don’t ya love it when a good plan comes together

[OldmanFCSA]

I have had several large pistols MagNaPorted, was a dealer for them once, it works great on my 444 Marlin TC Contenders. It is done with carbon graphite electrodes for roughing and finished with a copper electrode. No way to get wire edm in there. Some companies use Extrude Hone technology to deburr the inside of barrel using rubber sealed tubes and plugs to keep abrasive material in correct locations.
Forgot what caliber you were doing, but if you would slug the barrel with lead at point of penetration, the burrs would be minimized. After removing lead, do a Fire-Hone and call it good after a good scrubbing.

YMMV.

[FJ540]

Based on the angle of the port, it looked like they could've wire'd it if it was cut straight across.

[plink]

Try the process on a Hi-Point or mosin pistol first maybe?

[qualcorp]

Try the process on a Hi-Point or mosin pistol first maybe?

+1 give that high point a new look!