Question on stubbing?

[handi243]

Can a 12ga barrel be used for a stubbing project?

[trotterlg]

Yes, this one was done on a 12 gauge.  Larry

http://www.gboreloaded.com/forums/index.php/topic,118095.0.html

[knight0334]

trotterlg,

Would you mind if I used your methods to replicate your design for a couple custom pieces for myself?   Solely for personal use, not for profit.

[trotterlg]

Please do, and I hope you can make some money at it also.  I have done two with different methods, the one I posted for you is the easiest and most fool proof I think, good luck and If I can help let me know.    Larry

[knight0334]

Thank you, I appreciate the permission to use your intellectual property.

My uncle has a complete machine shop that I can use at my leisure. I figure if I try a stubbing project, that I could heat treat/harden the lug to hold up to one of my ideas for an über-powered .458 bored groundhog/prairie dog vaporizing rifle using some custom turned 3.25" to 3.5" rimmed casings with thicker walls/head for pressures greater than 45-70's limits..  (think 460Wby on steroids, but lower pressures)

[quickdtoo]

Bell 45 Basic brass is good for 60kpsi+...hint, hint!! I sectioned one, compared to a sectioned Hornady 500S&W case, the Bell is thicker in all the right places!!

Tim

[RWK]

Trottellg, got a ? for you when you fitted the two together was it a slip fit or does it have a slight shrink fit. I can tell you that your playing games with my head, being retired and a machinist your making me wanting to go back and play. Nice work---Rich K.

[trotterlg]

The fit  I ended up with was about a half thou interference fit, I am not that good of a machinest to do better, I chose the diameter to make it compatable with a 12 gauge chamber bore, a higher pressure round could require a little more metal in the chamber area of the barrel so you could bore the donor barrel chamber some.  I would think anything that a Contender is safe in woud work for this type of stubbing. Good luck I would like to see someone else try their hand at it.   Larry

[knight0334]

Bell 45 Basic brass is good for 60kpsi+...hint, hint!! I sectioned one, compared to a sectioned Hornady 500S&W case, the Bell is thicker in all the right places!!

Tim

Yeah, I've heard Bell brass is pretty stout stuff.   The only 45-120 brass I have is Beltran(?), ...I think, cant remember.  It's not ballooned brass though, just standard formed brass.    I've kept my loads very reasonable so far because I did experience some pressure signs once I got upto 18K PSI.  I try to only use it for black powder.

I see Midway has some Bell brass, which I make grab some here soon.  However I don't want to stress out my BC barrel/lug with heavy pressure, thrust and recoil.   ...which is why this stubbing idea may allow my to heat-treat and modify a donor lug without damaging or distorting the barrel to hold up to some serious energy.

Do you know anything about the Norma or Jamison 45-120 brass?   I think Jamison bought out someone, cant remember who though.

[quickdtoo]

Jamison bought out Bell, but hasn't started their machines yet that I know of. Cabelas has Norma 45 Basic, TOTW has Bell Brass in stock. In the 45-120 data, even 60gr of H4895 behind a 500gr cast bullet at over 1800fps has only 28.5kcup pressure.

Tim

http://trackofthewolf.com/(S(qroxkd5502n4ie2zpabc2l45))/categories/PARTDETAIL.ASPX?CATID=2&SUBID=190&STYLEID=929&PARTNUM=CASE-45-120

[trotterlg]

While boring out a 410 stub for a previous project I did notice hard and soft spots in the barrel, I can only assume it is caused by the welding of the lug.  Larry

[trail trol]

This may be a silly question, but can you use the NEF barrel itself for the stubbing? If I cut an 06 barrel say, forward of the chamber and lug, would there be enough meat left to rechamber the barrel to 30 Herret after using this method?  Bill

[eskimo36]

i have had that thought myself on a 25-06 for a 25-20 or 25-35....