Custom made breechplug?

[LittleGump72]

Hey guys, I have a question.
Would a grade 8 bolt be safe to make a breechplug out of? The reason I ask is because I have access to a lathe and a cnc machine, along with people who have the knowledge to operate them.

 

[MeatMachine]

It should be.

 

[ronlaughlin]

Yes it is for sure for a smoker. Can say it worked good about 50 times.

 

[LittleGump72]

When time is on my side, I plan on trying to make one for my NEF Huntsman since there is only one place that I know of to get an after market plug now. I did get one from Metrics Unlimited before they quit offering them, and I also got one from Cecil. Would like to get another but don't really want to pay $80 if I can make one.

 

[ronlaughlin]

Making a plug one needs from a grade 8 bolt is certainly doable. We made several Blackhorn plugs for pre 2010 Accura rifles. They worked good. We also decreased head space to eliminate blow by. Photo shows one that has been gathering dust for several years now.

 

[LittleGump72]

So yesterday I bought a 5/8 grade 8 bolt with 18 tpi which I am sure is the correct threads. But for whatever reason it only screws into the breech 1 full turn then gets tight. So now I will take the bolt and breechplug to work on Monday to double check the threads and maybe clean up the threads on the bolt if needed. Otherwise it's back to figuring out what threads I really need.

 

[Danny Ross]

I have made all sorts of beech plugs out of 5/8-18 bolts with no problems. Here is a link to my article about making them:
https://www.modernmuzzleloader.com/threads/making-a-qrbp-from-a-5-8-x-18-x-2-bolt.34073/

 

[LittleGump72]

I have made all sorts of beech plugs out of 5/8-18 bolts with no problems. Here is a link to my article about making them:
https://www.modernmuzzleloader.com/threads/making-a-qrbp-from-a-5-8-x-18-x-2-bolt.34073/

Good information. Thank you.

 

[Danny Ross]

So yesterday I bought a 5/8 grade 8 bolt with 18 tpi which I am sure is the correct threads. But for whatever reason it only screws into the breech 1 full turn then gets tight. So now I will take the bolt and breechplug to work on Monday to double check the threads and maybe clean up the threads on the bolt if needed. Otherwise it's back to figuring out what threads I really need.

Have you used a thread gauge to measure the "TPI" on your Huntsman? Rossi and CVA mostly use 5/8-18 threads, and the Remington 700 ML uses 11/16-16(?)

 

[LittleGump72]

Have you used a thread gauge to measure the "TPI" on your Huntsman? Rossi and CVA mostly use 5/8-18 threads, and the Remington 700 ML uses 11/16-16(?)

Yes I took my breechplug to work and we used a thread gauge to check it. Supposed to be 5/8-18 but I might check it again.

 

[michiganmuzzy]

Yes I took my breechplug to work and we used a thread gauge to check it. Supposed to be 5/8-18 but I might check it again.

There is a close metric that, i think, is m18x2. See if its metric.

 

[LittleGump72]

There is a close metric that, i think, is m18x2. See if its metric.

Ok will do. Thank you, appreciate the info.

 

[brad502a]

Have you used a thread gauge to measure the "TPI" on your Huntsman? Rossi and CVA mostly use 5/8-18 threads, and the Remington 700 ML uses 11/16-16(?)

11/16"-20 tpi

 

[Walkingeagle]

I have made all sorts of beech plugs out of 5/8-18 bolts with no problems. Here is a link to my article about making them:
https://www.modernmuzzleloader.com/threads/making-a-qrbp-from-a-5-8-x-18-x-2-bolt.34073/

Danny,
This homemade breech plug (in your link), has it got a touch hole or is it drilled to be full cartridge bore this allowing for the case to fill fully with BP?
Walk