Hard click at top of bolt lift

[fguffey]

They don't measure in tensions, they measure in thousandths.

I am sure you do and I am convinsed you can but I do not know what your measuring. I am the only one that has tension gages; problem, my tension gages do not measure tension, all of my tension gages measure in pounds and then there are my deflection gages, they measure in thousandths and are caliberated in pounds.

F. Guffey

 

[dmoran]

 

[shoot4fun]

 

[LHSmith]

Yes, the professor still lives https://www.bing.com/videos/search?q=Doctor+Irwin+Corey&&view=detail&mid=F6437B68478386A97659F6437B68478386A97659&FORM=VRDGAR

 

[fguffey]

if someone wanted to do some planning he could produce a chamber, die, and shell holder setup that allowed for sizing farther down the case. As long as your die can reach a little past where your chamber does, you will have what you need.

Or they could use a feeler gage to raise the case head off of the deck of the shell holder. I use the feeler gage when forming/sizing cases for short chambers. With the aid of a RCBS shell holder I can reduce the case length (from the shoulder to the case head) by .012" shorter than a full length sized case when measured from the shoulder to the case head. And then there is no one that has a clue what purpose the short case serves. When I cut a chamber I want to know the length of the chamber from the shoulder to the bolt face. I know; it sounds cool to say "when cutting a chamber check often because no one knows where they are until they are finished". Anyhow, I size cases for short chamber, I size cases for long chambers and I have never found it necessary to grind the die and or shell holder.


I purchased a set of Rddding Competition shell holders for $5.00, I did not need it and I have not used it but JIC as in I have it just in case. The set is#6 for belted magnums.


F. Guffey

 

[fguffey]

Typically, I use an insert that gives me .0005 sizing above the extractor groove.

And typically no one know the case head protrusion from the barrel and typically no one know the thickness of the case head from the cup above the web to the case head.

F. Guffey

 

[Ggmac]

Pm sent to the op .

 

[Link]

Let me see if I can even explain myself as I am a back yard shooter. I shoot a rem action 30BR. none of my cases click before shooting, however 1/4 of them have that click at the very top of the lift of the bolt on a fired case. I use Competition shell holders #6 to get my .002- of head space. However using these prevents me from resizing that .006 of the last bit of case. So I am going to try a 308 or 30 06 body die with a standard holder to try to size this area without touching the shoulder. And maybe use a shim on the holder face. I am not going to buy new dies as it is near new barrel time. Your thoughts please.
thanks for your time.

 

[BoydAllen]

Of course I would encourage anyone to try anything that is not inherently dangerous, and what you propose does not seem to be at all. While we are at it, perhaps you might want to consider another alternative. Back in the day, a friend needed to size the heads of some .243AI cases, and did not want to invest in an expensive FL die. He had chambered the barrel, made a bump die from scratch using the chambering reamer, was sizing the necks with a collet die and had ignored me when I told him that he would be having a problem with cases getting tight at their heads. Ordinarily I would have just let him stew, but since he is a friend, and had done me some favors, I decided to see what I could do. I found a used RCBS, non-carbide .45 ACP die set at a local gun show ($10), and gave him the FL die body to use as a ring die, with instructions that he might have to polish it out a bit if it sized too much. It didn't and he is still using it. He has more money than he will spend, but he would rather do a three step sizing process than part with the money for a custom die. Recently a friend of ours (his and mine) ran into the same problem with a tight spec. 6mm Remington chamber that his standard FL die was to large to size the base of. He used a new Lee carbide .45 ACP die but had to do a little lathe work the die body had some feature that was in the way. I guess he was lucky in that if it had sized more than he wanted, he would have had to figure out how to polish out the carbide insert, not something that most of us are equipped to do. As it turned out, it worked perfectly. If you have a reach problem, because of the chamfer/radius of the die opening, and you are woring with a die that is not going to touch the shoulder of your case, you might consider shortening the die enough to remove most of the radius, and taking some off of the top of your shell holder too. My friends' problems were simpler, and did not require either.

 

[savagedasher]

Let me see if I can even explain myself as I am a back yard shooter. I shoot a rem action 30BR. none of my cases click before shooting, however 1/4 of them have that click at the very top of the lift of the bolt on a fired case. I use Competition shell holders #6 to get my .002- of head space. However using these prevents me from resizing that .006 of the last bit of case. So I am going to try a 308 or 30 06 body die with a standard holder to try to size this area without touching the shoulder. And maybe use a shim on the holder face. I am not going to buy new dies as it is near new barrel time. Your thoughts please.
thanks for your time.

Have you tried the Fired case that sticks in the chamber pushing in by hand without bolt? If it sticks the problem to me would excessive pressure at ignition and your expanding the head of the case. That you should be able to meisure. The click is primary extraction or lack of. Larry

 

[dkhunt14]

Have you tried the Fired case that sticks in the chamber pushing in by hand without bolt? If it sticks the problem to me would excessive pressure at ignition and your expanding the head of the case. That you should be able to meisure. The click is primary extraction or lack of. Larry

Larry usually if it is hot loads the bolt lift is hard from the start all the way till extraction. When it lifts easy but clicks at top it is the back of the case isn't sized enough. It is usually caused by a reamer that is tight at the back end or a die that is too big to size the case at back. Matt

 

[WayneShaw]

I'm still scratching my head what the "deck height" of the shell holder has to do with the lack of sizing at the base. It's so simple......

 

[sdneil]

Hate to delete this post...couple on here havin so much fun...Pretty shure have problem under control...thanks to all...Neil G

 

[sdneil]

DKHUNT...PM sent...Neil

 

[fredo]

Larry usually if it is hot loads the bolt lift is hard from the start all the way till extraction. When it lifts easy but clicks at top it is the back of the case isn't sized enough. It is usually caused by a reamer that is tight at the back end or a die that is too big to size the case at back. Matt

Agree 100%

Just went thru this with a 'one off' wildcat.

Was making due neck sizing brass for it with an 'off the shelf' die. But, after a few "very warm" firings, the 'click' at the top of the bolt throw became burdensome. NFG for a hunting rifle! Figured it was a (lack of) sizing issue, so I ordered a custom FL die from CH4D. Dave Davison made the die straight from the reamer print I sent. Even specified an optimal min. neck dia. so the necks wouldn't be overworked...

With matched FL die in hand, one pass of 'clicky' brass thru the sizer resulted in a return to a smooth extraction cycle. No more 'click' and brass flings outta the chamber like a champ...

 

[savagedasher]

Agree 100%

Just went thru this with a 'one off' wildcat.

Was making due neck sizing brass for it with an 'off the shelf' die. But, after a few "very warm" firings, the 'click' at the top of the bolt throw became burdensome. NFG for a hunting rifle! Figured it was a (lack of) sizing issue, so I ordered a custom FL die from CH4D. Dave Davison made the die straight from the reamer print I sent. Even specified an optimal min. neck dia. so the necks wouldn't be overworked...

With matched FL die in hand, one pass of 'clicky' brass thru the sizer resulted in a return to a smooth extraction cycle. No more 'click' and brass flings outta the chamber like a champ...

I find it's not the reamer it's the smith when they pre chamber they bore the chamber too big . The final pass when chambering does not finish the taper the bac end is correct just foward doesn't have a taper . It will be tents of a thousands But that is enough for the case to stick. The fix is to polish the last 1/2 " bigger. Larry

 

[fredo]

I can agree that a 'gun plumber' might ruin a chamber job, as mentioned above. However, in my specific case, Greg Tannel did not bore the chamber "too big", that ain't his style Greg makes the stuff that great gunsmiths smith great guns with...

That possibility negated, my "fix" was simply to have a FL die custom fit to the chamber.
Viola, problem solved!

Hope the OP finds similar happiness... good luck!

 

[dmoran]

I am sure you do and I am convinsed you can but I do not know what your measuring. I am the only one that has tension gages; problem, my tension gages do not measure tension, all of my tension gages measure in pounds and then there are my deflection gages, they measure in thousandths and are caliberated in pounds.

F. Guffey

 

[expiper]

whew,,,thanks,,I thought that I was the only one who was confused and didnt uderstand the "tension" ,,,Roger

 

[savagedasher]

I can agree that a 'gun plumber' might ruin a chamber job, as mentioned above. However, in my specific case, Greg Tannel did not bore the chamber "too big", that ain't his style Greg makes the stuff that great gunsmiths smith great guns with...

That possibility negated, my "fix" was simply to have a FL die custom fit to the chamber.
Viola, problem solved!

Hope the OP finds similar happiness... good luck!

Why then is their a problem? Larry