Annoying scenario I'm running into right now.

[noload]

Pretty simple to see if the base is too big for the chamber. Push a sized case in the chamber with your finger, if it sticks at all when pulling it out with a dental pick, the base is the problem. With a tenth mic, you can measure all the differences between the fired cases and sized cases, as another poster said.

 

[fguffey]

He's already setting the shoulders back .004" and .006". Why would he grind the die?

Why? I always wonder why the bench rester/reloader does not know if there die and shell holder has the capability to reduce the length of the case to minimum length from the shoulder to the case head.

After that there is the deck height of the shell holder. It is impossible to size the case head because the case head is in the shell holder and protruding from the die .125” when sized and no one checks to see if the die made it to the shell holder. There is a chance the case has more resistance to sizing than the press can overcome; that leaves the reloader assuming the case is being sized because the ram went up.

F. Guffey

 

[fguffey]

Pretty simple to see if the base is too big for the chamber.

And there are chamber gages, there are case gages, there are take off barrels and there are dies.

F. Guffey

 

[Webster]

I am the only person reading this thread that will never have this problem; because I do not use fixed gages, go-gages are nice, I will say the same for the no go-gage and field reject length gage; problem, there can be .005" difference in length between the go and no-go gage and .011" difference in length between the go gage and filed reject length gage.

And then there is the chamber cast.

F. Guffey

I like your answer. I trust Kelbly. What's your opinion? If the second gunsmith ran the reamer in 0.005" deeper and it doesn't pass a go-no go test, does he have to remove the barrel and put it back in the lathe to remove a few thou off of the threaded tenon? Sounds like an area a bad gunsmith could take short cuts and say good enough the customer will never know. Correct me if I am wrong, a reamer doesn't have a stop on it, the gunsmith decides how far to push into the barrel.

 

[fguffey]

Correct me if I am wrong, a reamer doesn't have a stop on it, the gunsmith decides how far to push into the barrel.

Depends, in the book THE COMPLETE GUIDE TO PRECISION RIFLE BARREL FITTING by John Hinnant it can be done. And there is more than one way to to comntrol feed. I do not believe there is an excuse for a smith not knowing where they are when finishing the chamber. I will not start unless I know where I am when I start.

F. Guffey

 

[Webster]

Depends, in the book THE COMPLETE GUIDE TO PRECISION RIFLE BARREL FITTING by John Hinnant it can be done. And there is more than one way to to comntrol feed. I do not believe there is an excuse for a smith not knowing where they are when finishing the chamber. I will not start unless I know where I am when I start.

F. Guffey

Just looked at video's on Utube showing barrel chambering. You don't have to remove the barrel from the lathe and screw it onto the receiver to measure head space with a go-no go gauge. With the barrel still in the lathe you insert the go-no go gauge. The back of the no-go represents the bolt face. You measure from the back of the no-go to the back of the barrel. This tells you how many more thou the reamer has to go in.

Not sure how this relates to the actual bolt face in the receiver location????