Pistol barrel shortened and reverse crowned-how to

[lmh1022]

thanks for the tips

 

[woodchopper]

the cutting in a lathe takes less time then the setup, and the final polishing.

once chucked up and centered its a quick pass at 11 deg and then a light touch up at 60 deg then polish to desired mirror finish.

Sharp tools are important.


but I'm not a gunsmith... but I would never use a hacksaw

 

[guntech]

I'm not a gunsmith... but I would never use a hacksaw

I am a gunsmith (51 years now) and I have a few hacksaws and they get used on a regular basis.

 

[RePete]

I always laugh when I see 'precision' and 'hacksaw' in the same context

Ah, but it's a Starrett precision hacksaw!

 

[ffgats]

a follow up question, can you recrown a recrown bbl. the bbl was cut and recrown but the result was not desirable, can you REDO the crown. thanks

 

[FLHTCUI]

Aka a target crown

LoL, someone re-inventing the wheel.
Sounds like the guy just wants to customize his pistola for aesthetic purposes.
Nothing wrong with making it ones own special pistola now is there?
Make sure you share the outcome with pictures when you get your barrel back.
Rob

 

[RePete]

a follow up question, can you recrown a recrown bbl. the bbl was cut and recrown but the result was not desirable, can you REDO the crown. thanks

You can IF there is enough material.

 

[Duramax6.6]

It requires a very smooth cut with a very sharp high speed steel tool, not a carbide tool... and carefully polished with 320 wet/dry paper, then 400 wet/dry paper in both directions. Stay out of the rifling. When all finished wipe in and out with a cue tip... it should not catch on any edges anywhere.

Mansonreamers.com

His use of carbide cutters for re-crowning look fantastic and passes the Q-tip test. Why are you against carbide for this job? I'd like to buy the Manson kit for a few common calibers.

 

[guntech]

Mansonreamers.com

His use of carbide cutters for re-crowning look fantastic and passes the Q-tip test. Why are you against carbide for this job? I'd like to buy the Manson kit for a few common calibers.

If you are cutting it with a bit in the lathe a home ground HHS bit is better than a home ground carbide bit ... but a properly ground piloted carbide facing tool (as Manson makes) works wonderfully.

 

[Duramax6.6]

Guntech, thanks for that. You've mentioned you've got over 5 decades experience in gunsmithing. I'd be a total idiot not asking you a question when you generously make yourself available here. I hope the members here truly understand the quality of resources this forum makes available to the shooting cummunity and I thank you and others for your willing contributions.

 

[stevebc]

Ahhhh... the old 11 degree crown... supposed to help stability at 2000 yards... or some other drivel like that...

Funny you should mention that. I had a smle that needed to be recrowned, and couldn't find an 11 degree piloted reamer.

However, somewhere online I'd read that the 11 degree figure, while standard, was actually arbitrary. Wish I could recall where I read that...

Anyway, I got a 45 degree piloted reamer and used that to great effect.