Chamber flush system build log.

[spitfire_er]

I've run 80 psi w/o issue with my setup on post #130. Has spiked to 100psi. I Try to ream in the 20-40 psi range though. With proper oil grooves in the reamer, it doesn't take much.

 

[X Count]

Roger. I'm about half that. Too scared to blow my dongle off the muzzle end of the barrel. I'll turn up the next one and wrap a diaper around the attachment

Yeah I'm drilling and tapping the muzzle and threading my union in which is extra work and you loose and inch. If it's threaded for a muzzle device you could do something like DSMWorks.

I don't do enough to have a serious need for anything else at this stage but they make coolant sealed ER collets but haven't seen any available cheap enough to try. That way you could have a collet set and use a cheap collet chuck with an adaptor on the back to suit the union

 

[LVLAaron]

I'm sure mine will too, I just don't want to find out.

 

[Dusty Stevens]

Funny thing is...he used to sell his muzzle flush cup with clear reinforced plastic line that hardens in a day if it contacts petroleum products.

He also sold the muzzle adapter with plastic thumbscrews. It caused valzez style disasters in every shop i knew of that tried it. I went to a 1/8npt deuplin coupler after my run in

 

[LVLAaron]

He also sold the muzzle adapter with plastic thumbscrews. It caused valzez style disasters in every shop i knew of that tried it. I went to a 1/8npt deuplin coupler after my run in

Were you drilling/tapping the muzzle end? Did you drill it with a hand drill? It's a real PITA to hand drill a 21/64's hold in a 308 barrel by hand

 

[Walt Krafft]

Do it in the lathe

 

[LVLAaron]

Yeah. Can do that.. I just dont want to set up the barrel 3 times if I don't have to.

 

[Dusty Stevens]

Yeah. Can do that.. I just dont want to set up the barrel 3 times if I don't have to.

Just stick it in. You aint gotta worry too much on dialing in. Youre going to cut that much off anyway. Takes just a few mins to drill n tap

 

[SKWERLZ]

Just stick it in. You aint gotta worry too much on dialing in. Youre going to cut that much off anyway. Takes just a few mins to drill n tap

True.

 

[LVLAaron]

I'm running 80 psi but don't have to worry about a blow out with the muzzle adapter set up. I turn the the volume valve to a smaller flow amount on retracting before the bushing exits the bore. The hose I used was petroleum rated but we'll see how it does. Wish it was more flexible even when new though.

What's that kind of washer called?

 

[GenePoole]

This one doesn't leak and will hold at least 100 PSI....

Model BTS | gretanrifles

"BARREL THROUGH SPINDLE"This barrel adapter was designed for the gunsmith with smaller lathes in mind. If your chambering method is to mount the barrel through the spindle bore, and indicate the chamber end at the chuck, and the muzzle out the rear of the spindle with a spider.THIS is just what...

www.gretanrifles.com

Don't over think it.

 

[DSMWerks]

What's that kind of washer called?

Its a 5/8" sealing washer

https://www.mscdirect.com/product/details/65075764

 

[X Count]

Don't over think it.

Gene is that just pushed on or did you warm it up and flare it to suit

 

[GenePoole]

When I first got the tubing, it was flexible enough stretch over, but after a year or so, I either have to replace it, or hit it a little with a heat gun to get it flexible enough to stretch.

 

[LVLAaron]

When I first got the tubing, it was flexible enough stretch over, but after a year or so, I either have to replace it, or hit it a little with a heat gun to get it flexible enough to stretch.

Silicone?

 

[GenePoole]

Silicone?

No. Just cheap vinyl from Lowes.

 

[jimmymac]

Too scared to blow my dongle off

 

[LVLAaron]

Swapped out the nylon screws for these... I dont think it'll blow off.

 

[spitfire_er]

Swapped out the nylon screws for these... I dont think it'll blow off.


View attachment 1434627

250 psi rated!

 

[ridgeway]

The nylon screws on gretan cup are a non issue. Just have to keep an eye on the rubber tip rubber air gun nozzle for wear/cracks. They do get harder when used with oil. What wears them is flushing an already crowned barrel or saw cut barrel. If you have a nice smooth lead in chamfer on the barrel...seal hold up fine. Over time, the airline swivel will start to seep. Simply replace and will last another 5 years. Another issue is they come with vinyl hose, atleast they used to. Well mine cracked in a straight portion of the hose and you can imagine the mess I had when that went. Use rubber that is approved for petroleum and no hose issues. Other than that...it works and been using it for 5-6 years now. I may do 6-10 barrels a year so low volume here.