The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Reply
 
Thread Tools Search this Thread
Old May 21, 2020, 04:04 PM   #1
Shadow9mm
Senior Member
 
Join Date: March 21, 2012
Location: Indianapolis, IN
Posts: 160
primer cratering

So I zeroed my new rifle, at TC Compass in 30-06. I started working through a batch of hand loads and noticed primer cratering with the starting loads. started with 47g of varget over a 150g hornady interlock. i looked back at the factory loads i had zeroed with and they were all cratered as well. federal power shock 150g, federal fustion 150g, and remington core lokt 220g. the three together are the factory loads, the ones in the box are my hand loads. friend sait it might be a too long firing pin? I contacted TC, waiting for an answer from them.

Attached Images
File Type: jpg factory.jpg (76.4 KB, 131 views)
File Type: jpg hand loads.jpg (246.0 KB, 134 views)

Last edited by Shadow9mm; May 21, 2020 at 04:11 PM.
Shadow9mm is offline  
Old May 21, 2020, 05:00 PM   #2
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 7,721
Looks semi safe to me.

Common thing when there's too much clearance from the firing pin tip to its hole in the bolt face. Good inspectors firing proof loads at the factory will see that problem then send the rifle back to production to be fixed.

Good gunsmiths can hard chrome plate that pin tip to a .001" clearance. Had that done to a Winchester 70 back in 1967.

Last edited by Bart B.; May 21, 2020 at 05:08 PM.
Bart B. is online now  
Old May 21, 2020, 05:38 PM   #3
hounddawg
Senior Member
 
Join Date: March 1, 2009
Posts: 2,977
Wait and see if Thompson will make it right first but almost any competent gunsmith can bushing the firing pin

these guys do it all the time, you can call for a price and see if they do Thompsons

https://www.gretanrifles.com/
__________________
“How do I get to the next level?” Well, you get to the next level by being the first one on the range and the last one to leave.” – Jerry Miculek
hounddawg is offline  
Old May 21, 2020, 07:20 PM   #4
Shadow9mm
Senior Member
 
Join Date: March 21, 2012
Location: Indianapolis, IN
Posts: 160
Quote:
Originally Posted by hounddawg View Post
Wait and see if Thompson will make it right first but almost any competent gunsmith can bushing the firing pin

these guys do it all the time, you can call for a price and see if they do Thompsons

https://www.gretanrifles.com/
I sent them an e-mail, just to get a quote, told them I was waiting to hear back from TC. Will see what they say.
Shadow9mm is offline  
Old May 22, 2020, 01:54 PM   #5
hounddawg
Senior Member
 
Join Date: March 1, 2009
Posts: 2,977
if they do not might try EABCO they specialize in Thompson's

https://www.eabco.net/TC-ARMS_c_2728.html
__________________
“How do I get to the next level?” Well, you get to the next level by being the first one on the range and the last one to leave.” – Jerry Miculek
hounddawg is offline  
Old May 22, 2020, 02:07 PM   #6
Paul B.
Senior Member
 
Join Date: March 28, 1999
Location: Tucson, AZ
Posts: 3,383
You might want to look at the face of the bolt to see if it might be a bit too large or might have been chamfered. I have a Remington 700 BDL what will produce a cratered primer even with light 5.0 gr. Unique cast bullet loads designed for plinking. When I inspected the bolt face using a magnifying glass, I saw the the hole had been slightly chamfer, for whatever reason I have no clue. May the hole had a burr and they tried to clean it up. I've run some seriously stiff hunting loads through that rifle and I've never had a problem. Naturally YMMV.
Paul B.
__________________
COMPROMISE IS NOT AN OPTION!
Paul B. is offline  
Old May 22, 2020, 08:49 PM   #7
Shadow9mm
Senior Member
 
Join Date: March 21, 2012
Location: Indianapolis, IN
Posts: 160
Quote:
Originally Posted by Paul B. View Post
You might want to look at the face of the bolt to see if it might be a bit too large or might have been chamfered. I have a Remington 700 BDL what will produce a cratered primer even with light 5.0 gr. Unique cast bullet loads designed for plinking. When I inspected the bolt face using a magnifying glass, I saw the the hole had been slightly chamfer, for whatever reason I have no clue. May the hole had a burr and they tried to clean it up. I've run some seriously stiff hunting loads through that rifle and I've never had a problem. Naturally YMMV.
Paul B.
Paul B. you are a geinus! Managed to get a picture, needed more light to see it but I think you got it dead on! Thank you! Sent an e-mail to double check with TC to make sure it is supposed to be this way but I don’t think I will have to send her in!
Attached Images
File Type: jpg firing pin hole.jpg (39.4 KB, 60 views)
Shadow9mm is offline  
Old May 24, 2020, 08:52 AM   #8
ballisticxlr
Junior Member
 
Join Date: April 25, 2020
Posts: 7
Have that pin bushed. Looks like a hot dog in a hallway by those primer marks. Having a bolt bushed is usually not much more than 100 bucks.
ballisticxlr is offline  
Old May 24, 2020, 08:10 PM   #9
sparkyv
Senior Member
 
Join Date: May 2, 2015
Location: Deepinnaheartta,Texas
Posts: 234
I see no issue, Shadow9mm. I have several rifles like this. Not at all unusual.
__________________
μολὼν λαβέ
NRA Life Member
sparkyv is offline  
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump


All times are GMT -5. The time now is 08:55 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2018 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.05688 seconds with 10 queries