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Chamfered Bolt Mod

Started by Jayhawker, September 08, 2019, 12:26:27 AM

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Jayhawker

September 08, 2019, 12:26:27 AM
In a previous thread Charles McKinley recommended that I go to Rimfire Central and read about the chamfered bolt modification. So I did. Here is the link.

https://www.rimfirecentral.com/forums/showthread.php?t=251031

I don't have a disk sander, but I was going to get one and do it. I wanted to get an used bolt to to do it to first, in case I messed it up. So I went to the place where I always go to by used gun parts, Ebay. They had some really gnarly ones for $40 delivered. They looked like they were recovered from a land fill. Ebay recommended the JWH basic bolt. It has a radiused back edge, so it's going to impact the hammer at the same point as the Rimfire Central Chamfer modification. 

After figuring tool costs and other, buying a JWH basic bolt was by far the most cost effective option and is also the lazy way to go. So I did it.

I put 170 rounds through my rifle (with the JWH basic bolt installed) today using CCI SV and had ZERO malfunctions.

eaglescouter

#1
September 08, 2019, 02:32:18 AM
I did mine, radius and polish many years ago.
No regrets.
Old Guy:  Do it long enough and you get really good at it.

Rifleman:  Sacramento:  Four Ought Nine
Full Distance:  Red Bluff:  What year was that?
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Make yourselves good scouts and good rifle shots in order to protect the women and children of your country if it should ever become necessary.
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Scouting for Boys (1908)

Jayhawker

#2
September 08, 2019, 02:37:09 PM Last Edit: September 08, 2019, 04:31:19 PM by Jayhawker
I shot another 176 rounds today with one stovepipe.

The running total is 346 rounds fired and one stovepipe.

Quinncannon

#3
September 08, 2019, 08:30:20 PM
Good information!
"This we"ll defend"

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250 Perfect score, Bald Knob, 17 June, 2018
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TaosGlock

#4
September 08, 2019, 09:36:05 PM
One of my 10/22's got a chamfered bolt so I could cycle sub sonic ammo.
Works great too. ðŸ'
89 fantastic Appleseeds since 2008/24 Libertyseeds!
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New Mexico's first Rifleman: Sept. 2008 NRAWC
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They broke the law, because liberty is always illegal"- Larken Rose

Jayhawker

#5
September 15, 2019, 11:14:28 PM
Another 253 rounds with two stove pipes this weekend. Then, I gave my rifle a good scrubbing.

The running total is 599 rounds of CCI SV fired and three stove pipes with the radiused bolt back.

I'm pretty sure that I had more frequent stove pipes using CCI MINI MAGS with the stock bolt configuration.

Appleseed is next weekend in Hot Springs.

Jayhawker

#6
December 10, 2019, 10:32:52 PM
Just an average group with CCI Standard velocity

Quinncannon

#7
December 11, 2019, 11:23:39 PM
Good information, good shooting too!
"This we"ll defend"

Rifleman patch, first Appleseed, N. Little Rock, April 2010.
KD qualified, Talledega, July 2016
KD qualified, Manchester, Sept 2016
Distinguished, Bald Knob, Jan 2018
Distinguished, Bald Knob, June 2018
Infernoseed, Bald Knob, June 2018
250 Perfect score, Bald Knob, 17 June, 2018
Distinguished, Bald Knob, Jan 2019
Distinguished, Hot Springs, April 2019
Distinguished, Bald Knob, Jan 2020
Distinguished, Bald Knob,  Aug 2020
Distinguished, Bolt Action, Bald Knob, Jan 2021
Distinguished, Menifee, Arkansas Aug 2021
Distinguished KD, 50/50, 50/50, Hot Springs, AR Oct 2021
Distinguished, Bolt Action and Semi, Bald Knob, Jan 2022

M14man

#8
December 12, 2019, 09:27:30 AM
What are you using for lubrication?
Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude. -Thomas Jefferson

"There was one of two things I had a right to: liberty or death; If I could not have one, I would take the other, for no man should take me alive…" â€"Harriet Tubman

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Jayhawker

#9
December 15, 2019, 01:53:58 AM
I went back to Hoppes #9, because I found the bottle. I have used Remington spray can oil.

Regardless as to which one, I always use lots of it. That's why they invented safety glasses.

I have to say that I have had zero stovepipes since I went back to Hoppes #9.

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