2500 X owners. - Page 2 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #16  
Old Yesterday, 01:17 PM
Dennis D
US Air Force Veteran NRA Member - Click Here To Join!

Join Date: 
Mar 2004
Location: 
Oregon
Posts: 
115
TPC Rating: 
100% (1)
Excuse my ignorance but....



Log in to see fewer ads
Why should the firing pin ever contact the barrel at all????
None of my rimfires have a firing pin that protrudes far enough to contact the barrel when in the fired position. They all have aprox. .038 or so protrusion so with a head space of .043 there should be no problems with cone or slotted barrels.



Dennis
Reply With Quote
  #17  
Old Yesterday, 05:30 PM
Highdollar's Avatar
Highdollar

Join Date: 
Jun 2008
Location: 
Muscle Shoals Alabama
Posts: 
578
TPC Rating: 
100% (7)
Quote:
Originally Posted by Dennis D View Post
Why should the firing pin ever contact the barrel at all????
None of my rimfires have a firing pin that protrudes far enough to contact the barrel when in the fired position. They all have aprox. .038 or so protrusion so with a head space of .043 there should be no problems with cone or slotted barrels.



Dennis
That is what I was thinking Dennis. Just was not sure. I will do some measuring
Reply With Quote
  #18  
Old Yesterday, 06:37 PM
bob finger

Join Date: 
Apr 2008
Posts: 
1,130
TPC Rating: 
100% (1)
DennisD said in part "None of my rimfires have a firing pin that protrudes far enough to contact the barrel when in the fired position. They all have aprox. .038 or so protrusion so with a head space of .043 there should be no problems with cone or slotted barrels."

You do realize that in the fired position many pins are at rest and not extended to the point of hitting a case. If that were the case how would you ever rotate the bolt to extract a case? You need to measure how much the pin extends beyond the bolt face at the point of ignition, not after. Me, I ain't smart enough to tell you how to make that measurement. bob
Reply With Quote
 
  #19  
Old Yesterday, 06:55 PM
92lowrider's Avatar
92lowrider
NRA Member - Click Here To Join!

Join Date: 
May 2008
Location: 
Indiana
Posts: 
1,227
TPC Rating: 
100% (28)
Quote:
Originally Posted by Dennis D View Post
Why should the firing pin ever contact the barrel at all????
None of my rimfires have a firing pin that protrudes far enough to contact the barrel when in the fired position. They all have aprox. .038 or so protrusion so with a head space of .043 there should be no problems with cone or slotted barrels.



Dennis
With a cone breach and nothing in the chamber the bolt is not held back against the locking lugs. This allows the cone to enter the recess in the bolt face and even if you only have .038 of pin protrusion it will hit the edge of the cone. Headspace and pin protrusion measurments only apply if the bolt itself can't move forward as in when there is a round chambered or a flat breach that stops the bolt.
I am not in any way bad mouthing cone breaches they have their pluses, this is just their minus attribute.
Reply With Quote
  #20  
Old Yesterday, 08:18 PM
Highdollar's Avatar
Highdollar

Join Date: 
Jun 2008
Location: 
Muscle Shoals Alabama
Posts: 
578
TPC Rating: 
100% (7)
My pin looks like it measures 35 thousands. It may hit but I can't find a mark on the cone. And that don't mean it has not hit it but it is tight on the bottom side. Ole well no biggy but I guess it makes for good discussion
Reply With Quote
  #21  
Old Today, 12:14 PM
Dennis D
US Air Force Veteran NRA Member - Click Here To Join!

Join Date: 
Mar 2004
Location: 
Oregon
Posts: 
115
TPC Rating: 
100% (1)
Well all I can say is none of my bolt guns have rebounding firing pins so at rest they all sit against the firing pin stop which puts the pin at it's fully fired position. That's the case for my Falcon, Blackhawk, ULA's, Coopers, Tbolts and CZ and Anschutz. Additionally none of the pins extend past the bolt face so even if there were enough room for the bolt to move forward the pin still won't hit the barrel.
Course all of them are left handed so maybe this is only a problem for you right handed folks.....

I can see where this could be a problem for a cone breach if there is so much play as to allow the bolt to move to far forward though.

Dennis

PS, the reason they extract is that the first part of the bolt rotation retracts the firing pin before the extractor cam is contacted.

Last edited by Dennis D; Today at 12:25 PM.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




All times are GMT -5. The time now is 11:22 PM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 2000-2015 RimfireCentral.com
x