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  #21  
Old 04-10-2019, 02:25 AM
Bayou City Boy Bayou City Boy is offline
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Its hard to see for sure from the pics, but you need to cut off the case neck more than the length of the ridge on the gauge. I'm not saying you haven't but it looks close in your pictures.

Kevin's idea sounds like a good trail to follow. Beyond that, Quien sabe?

-BCB
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  #22  
Old 04-10-2019, 05:23 AM
DittoHead DittoHead is offline
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Originally Posted by Oso Polaris View Post
Next Attempt ???: Open for suggestions
Follow the link to the Sinclair page for the gauges. There is a video link and a link titled "Learn" on that page that should show usage.

If none of those help, I can type and post the instructions that came with one of my gauges.
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  #23  
Old 04-10-2019, 06:03 AM
Oso Polaris Oso Polaris is offline
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Default Tight Chamber?

I was thinking about the possibility of a Tight Chamber being the culprit causing the interference. The only reason that I hadn't jumped on this train earlier was due to the Gauge not easily fitting into the case neck when I try with my hands. I have an active 2 year old, which means I keep falling asleep and waking up at different times and never in my bed. I just woke up in my kids room....Apparently, I was successful in putting two people to sleep. I'm headed to the garage to find my calipers and hopefully get some closure...

When I first purchased the gun I had bought some formed 17-222 brass from Reeds Ammo and fired a handful of rounds. I tracked down one of the cases that was fired in this rifle. The OD of the neck is 0.2065".


I then put the calipers on the modified case with the Gauge still jammed 1/2 way in it. The OD of this case measured 0.2015"


Based on the fired case, I am interpreting this to mean that the neck of the chamber is 0.2065"? If so then the modified case/Gauge shouldn't be binding with the chamber walls. I guess we are back to a friction/binding issue between the Gauge and Case.

Update: It occurred to me that I hadn't measured the diameter of the front end (cap) on the Gauge, which has a shoulder and is wider than the body of Gauge. It measures 0.195", which is within the OD of the case but wider than the ID of the case mouth. It should not be contributing to the issue.

Last edited by Oso Polaris; 04-10-2019 at 02:52 PM.
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  #24  
Old 04-10-2019, 03:27 PM
Oso Polaris Oso Polaris is offline
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Default Sinclair Chamber Length Gauge - Demistified

Quote:
Originally Posted by DittoHead View Post
Follow the link to the Sinclair page for the gauges. There is a video link and a link titled "Learn" on that page that should show usage.

If none of those help, I can type and post the instructions that came with one of my gauges.
Thank you. Yesterday, I viewed the video on Sinclair before starting the process. The process in the video was deceptively easy. It leaves off a key point, which is that the Gauge should be pre-seated into the case using your reloading press and bullet seating die. Apparently, the friction bind between the case/Gauge is to great for the bolt to manage the full seating depth. This critical point is included in the written instruction under #4.



To all - I humbly apologies for having taken you on a Fool's Errand.
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  #25  
Old 04-10-2019, 05:10 PM
Oso Polaris Oso Polaris is offline
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Default Chamber Length

Alright - We are Done!!!!

I drilled out the back of the case (3/16") and made a knock-out block with a 3/8" hole, which fits the body of a .223 case. Insert the case upside down while inserted in the shell holder and use a steel rod or drill bit to tap out the Gauge.


I ended up having to shorten the case neck two additional times to give extra room for Gauge to slide back. To avoid a crush fit, I made sure that when the bolt finally closed there was still a slight gap between it and the case mouth. As the instruction stated I used my reloading press to do the majority of the seating of the Gauge leaving only a few tenths of an inch for the bolt to move the Gauge back. This was a trial and error process of placing the case in rifle and try to shut bolt. Based on amount of space the bolt still needs to travel in order to close, I would re-adjusting Gauge's seating depth using the reloading press.

PO Ackley's spec for the 17-222 has a case length of 1.700". My rife has a slightly short chamber of 1.686".


So much for the idea/possibility of forming cases with longer case necks to reduce the jump when/if I were to use 20gr bullets (except the VMax).

Last edited by Oso Polaris; 04-10-2019 at 05:18 PM.
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  #26  
Old 04-10-2019, 05:56 PM
Bayou City Boy Bayou City Boy is offline
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I'm glad you got it to work.

I figured that cutting the case neck down more would provide additional clearance for the gauge. In the times I've used the gauges, I have always been left with very little case neck to make it all work properly.

A shorter than usual chamber is not a bad thing. I'd rather have a short chamber instead of a too long chamber like you find on some factory rifles today. Knowing that it is shorter is definitely important from a case trimming perspective. Based on how the barrel is throated, chamber length may be a non-factor in bullet choices.

-BCB
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I miss mean Tweets, competence, and $1.79 per gallon gasoline.

Yo no creo en santos que orinan.

Women and cats will do as they please. Men and dogs should relax and just get used to the idea.

Going keyboard postal over something that you read on the internet is like seeing a pile of dog crap on the sidewalk and choosing to step in it rather than stepping around it.

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  #27  
Old 04-10-2019, 06:19 PM
Oso Polaris Oso Polaris is offline
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Quote:
Originally Posted by Bayou City Boy View Post
I'm glad you got it to work.

I figured that cutting the case neck down more would provide additional clearance for the gauge. In the times I've used the gauges, I have always been left with very little case neck to make it all work properly.

A shorter than usual chamber is not a bad thing. I'd rather have a short chamber instead of a too long chamber like you find on some factory rifles today. Knowing that it is shorter is definitely important from a case trimming perspective. Based on how the barrel is throated, chamber length may be a non-factor in bullet choices.

-BCB
Agreed. I prefer a tight chamber (in this case a short chamber) over the commercial chamberings with really long necks. If I want long then it should be in the throat for a specific bullet profile.

This short chamber made me start thinking about if it were intentional. I wonder how much the case length shortens when forming 17-222 brass from .222 Rem brass...is it 0.015" or more? This question gets placed on a sticky note with my forming dies to be answered on another day.
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  #28  
Old 04-10-2019, 09:27 PM
DittoHead DittoHead is offline
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Quote:
Originally Posted by Oso Polaris View Post
Thank you. Yesterday, I viewed the video on Sinclair before starting the process. The process in the video was deceptively easy. It leaves off a key point, which is that the Gauge should be pre-seated into the case using your reloading press and bullet seating die. Apparently, the friction bind between the case/Gauge is to great for the bolt to manage the full seating depth. This critical point is included in the written instruction under #4.

To all - I humbly apologies for having taken you on a Fool's Errand.
No apologies necessary. I like the knock-out block. Great idea.
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  #29  
Old 04-11-2019, 06:57 PM
426nut 426nut is offline
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Sorry Uncle. Your niece has been reading the thread along with me. When asked if she wanted to shoot the 17, she shook her head and said no. When asked Why not, She replied, "It is too big". E.
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  #30  
Old 04-11-2019, 09:37 PM
Oso Polaris Oso Polaris is offline
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Quote:
Originally Posted by 426nut View Post
Sorry Uncle. Your niece has been reading the thread along with me. When asked if she wanted to shoot the 17, she shook her head and said no. When asked Why not, She replied, "It is too big". E.
Thanks to everyone's input and advise the 17-222 will be waiting with a bunch of new brass loaded to play. As far as my niece - I bet she would change her mind if you were to put a Boyd's pink laminate stock on my spare CZ... At that age it was a bright red stock that convinced her cousin to make the trip to the range with dad.

See you at Christmas. Dress warm...it will be in the low 60's.

Last edited by Oso Polaris; 04-11-2019 at 09:43 PM.
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