New bolt with semi-used bolt carrier (600 rounds)

American Red Neck · June 7, 2013, 12:27 AM

Um can I use this new bcm bolt with my semi-used sig m400 bolt carrier. im going to change the cam pin as well. is this going to be ok? bolt should be here in the morning, gonna check headspace and then go shooting..
thanks.

Quentin2 · June 7, 2013, 01:34 AM

As long as the SIG BCG is milspec. But why swap? Or did you just buy a BCM bolt?

Fishbed77 · June 7, 2013, 07:48 PM

Keep shooting the SIG bolt until it wears out in 10,000-15,000+ rounds. Save the new BCM bolt to use then.

No need to have wear on two bolts.

American Red Neck · June 7, 2013, 10:06 PM

ya i dont know...seeing my bolt jamed up on a rock and smashing that rock to dust makes me cringe. thats why the thought of swapping bolts comes to mind. i have shot at least 500 rounds since the incident and nothing has happened yet but i am not sure how strong these bolts are. not sure if i fatigued the lug that made contact. just dont know.

Fishbed77 · June 8, 2013, 01:28 AM

Quote:

seeing my bolt jamed up on a rock and smashing that rock to dust makes me cringe.

That tells you the C158 bolt steel is tougher than the little piece of rock. You are over-thinking this.

Metal god · June 8, 2013, 02:37 AM

Your killing us over here .

You need to start building another rifle before you destroy that one . You did the test on the bolt , it's fine . It's time to see some threads that are asking about your new rifle and how to build it .

June 7, 2013, 12:27 AM	#1
American Red Neck Junior member Join Date: May 8, 2013 Posts: 81	New bolt with semi-used bolt carrier (600 rounds) Um can I use this new bcm bolt with my semi-used sig m400 bolt carrier. im going to change the cam pin as well. is this going to be ok? bolt should be here in the morning, gonna check headspace and then go shooting.. thanks.

June 7, 2013, 01:34 AM	#2
Quentin2 Senior Member Join Date: June 18, 2009 Location: NorthWest USA Posts: 1,996	As long as the SIG BCG is milspec. But why swap? Or did you just buy a BCM bolt?

June 7, 2013, 07:48 PM	#3
Fishbed77 Senior Member Join Date: November 23, 2010 Posts: 4,862	Keep shooting the SIG bolt until it wears out in 10,000-15,000+ rounds. Save the new BCM bolt to use then. No need to have wear on two bolts.

June 7, 2013, 10:06 PM	#4
American Red Neck Junior member Join Date: May 8, 2013 Posts: 81	ya i dont know...seeing my bolt jamed up on a rock and smashing that rock to dust makes me cringe. thats why the thought of swapping bolts comes to mind. i have shot at least 500 rounds since the incident and nothing has happened yet but i am not sure how strong these bolts are. not sure if i fatigued the lug that made contact. just dont know.

June 8, 2013, 02:37 AM	#6
Metal god Senior Member Join Date: April 10, 2012 Location: San Diego CA Posts: 7,135	Your killing us over here . You need to start building another rifle before you destroy that one . You did the test on the bolt , it's fine . It's time to see some threads that are asking about your new rifle and how to build it .