Bore taper -

[TAJ45]

I want to take advantage of the choke in my blank. Any harm in chambering the unstamped end?
If a No No, why and how come?

 

[Dusty Stevens]

If your blank has choke you need to send it back unless its a shotgun barrel

 

[DaveTooley]

How do you know it "choke" in it?

 

[JSH]

Calfee put the choke end at the muzzle.

 

[zeke06]

Slug it. Push the slug till about 1/2 inch shy of the muzzle and push it back the other way. Even with only about .0001 of choke you will feel it push a bit easier and about the last inch or two it the slug will feel like it slides right out. Rimfire barrels are a lil different game but on center fires zero choke might be ideal but I’d rather have it a tenth or two tighter at the crown then loose.

 

[TAJ45]

Thanks guys. Allow me to try and make my question easier by restating.

Is there any reason, NON choke related, to not chamber from opposite end of bbl stamping on a blank.

I understand choke and believe in the potential benefits of a tenth or two choke at the muzzle.

Best retired toolmaker regards,
Tom

 

[Dusty Stevens]

if you have a straight blank I see no reason it cant be chambered backwards

 

[Ggmac]

Barrel manufactures suggest doing it the way it's stamped . The lay of the metal could foul faster , esp soft lead . I've tested before on button rifled barrels and it was true . ( I chambered the same barrel on both ends and just flipped it around )
Think of it this way , if it was acceptable Calfee would be sending all those barrels back or cutting them so short .
It'll work , chambering the wrong way , BUT will probably never be as accurate as it could be .

 

[Ggmac]

Another consideration , most times the chamber end is more concentric than the muzzle end . Sometimes it's a considerable amount , so much that it can make it to small for receiver threads

 

[Riesel]

Does it go from a right hand twist to a left hand twist? Thought about this so much and so hard I'm completely dizzy

 

[TAJ45]

Does it go from a right hand twist to a left hand twist? Thought about this so much and so hard I'm completely dizzy

Riesel,
As an apprentice, I wondered too ... But think of a nut and bolt. There is no top or bottom. Nuttin changes .

 

[TAJ45]

Ggmac,
You have addressed my question well.
It was the "grain" re mfrg that prompted my Q. Also, I have a bbl that I have marked as 6 tenths larger on non stamped end.
I had a bbl maker explain some of the ins nd outs of lapping. Even though I've spent more than a few hours on a Sunnen hone, never a barrel bore.
I'll remeasure and if indeed I'm .0006 larger, I may just ask to send it back for a replacement.

 

[DaveTooley]

Is that .0006"measurement at very end of the barrel or an inch or so in?

 

[TAJ45]

IN.... :/

 

[Riesel]

Riesel,
As an apprentice, I wondered too ... But think of a nut and bolt. There is no top or bottom. Nuttin changes .

Aah so, like a piece of all thread. Feeling better already
Thanks

 

[swd]

.0006" in a ways, I'd send it back.

 

[Dusty Stevens]

@Stan Taylor can shed some light on chambering a button barrel from either end.

 

[Stan Taylor]

If the barrel indeed has reversed taper if you indicated the muzzle end an it is a button barrel it may shoot fine personally I would send it back.

 

[TAJ45]

How do you know it "choke" in it?

Sorry Dave, I had answered your question...... apparently I didn't get it sent. Either range rods or Deltronic pins, I just can't remember.