I believe the Early Mk11 Ross rifles had this problem but evidence shows that the bolt stop in the receiver was small and incapable of coping with canuck squaddies using ammo boots to open the bolt when it jammed. Rifles went throuh a hardening process in base areas for this and other issues and again the problems are that the instructions to armourers for the work could and were misinterpreted. record keeping wwasnt good and therefore rifles assumed to be safe may not have been and vice versa.
They are capable of outstanding accuracy and remained in service for sniping until the end of hostilities although issued in emergency during WW2 I believe. My late Gt Uncle (Cdn Gren Gds in Ww2) told me tales of them and his Father served for 2 years in WW1.

The Ross bolt CAN be assembled wrongly, and can be fitted so that it will fire from an open breech. This is either as a result of the bolt being disassembled and them reassembled wrongly or as a rsult of the bolt head jumping past the extractor stop. If however the bolt is fitted to the rifle correctly, it CANNOT get into the wrong configuration. As Ugly says, the other problem with the Ross was that the back of the bolt head used to get damaged on the action when the bolt was drawn back causing the bolt to jam when closed.

The accuracy of the rifle, considering that it is fully stocked and bedded, is quite remarkable...

The correct function test is to check that, when the bolt is open, there must be at least 1" between the bolt head and the bolt body as indicated on the attached photo...

Originally Posted by steven04

3.5 of my AR's

From the top M4 carbine 14.5" , .30 carbine lever action, V22 .22LR , 20" AR
The .223's are used for PR/CSR, V22 for mini-rifle and .30 for gallery.

Optics include 3 x ACOG's & an Eotech 553.



My AMSD .50/ Reflex T16/S&B 5-25

I think we've met!

Originally Posted by HE117

My favorites..

None o yer modern cr@p..

For Accuracy - my Ross
The current project... Madam Lebel
But my favorite - by a long mile - Mr Martini 'enery..

Must have a chat with you about 577/450 for mine.

I tried but was unable to incorrectly assemble my Ross bolt, I even fired it with the bolt release in the release position and it seemed to be ok, it was a M1910 Mk3.

[quote="EX_STAB"]

Originally Posted by steven04

3.5 of my AR's

From the top M4 carbine 14.5" , .30 carbine lever action, V22 .22LR , 20" AR
The .223's are used for PR/CSR, V22 for mini-rifle and .30 for gallery.

Optics include 3 x ACOG's & an Eotech 553.

My AMSD .50/ Reflex T16/S&B 5-25

I think we've met!

that AMSD looks familiar, not many of them in the UK. steven04 i think i may have met you too on one of my visits to radnor to watch these big boys play.....................

http://www.fcsa.co.uk/

Originally Posted by ugly

I tried but was unable to incorrectly assemble my Ross bolt, I even fired it with the bolt release in the release position and it seemed to be ok, it was a M1910 Mk3.

Mine is an M10 as well...

The problem with the bolt is a little difficult to describe, but is essentally to do with the rotation of the head. As you will know, you have to rotate the bolt head a quarter turn against it's spring before you can fit it into the gun. The rotation of the head is stopped at the 90degree point by the extractor bar. It is possible to rotate the head further past the bar by forcing the stud in the extractor past the groove in the head. If you do this for another 90 degrees the head will drop back flush with the bolt body. The bolt is then 180 degrees out of alignment and can be fitted to the rifle, in this state it will chamber a round, but the bolt head will not rotate when it enters the breech. The striker will come forward and intiate the round, but the breech is still unlocked and will fail catastrophically.

You have to be quite a determined mong to get this wrong, however as they say...

I toyed around with posting a set of instructions on how to correctly strip and reassemble the bolt, but thought that this may be tempting fate...

Dunno - what do you think..?

Originally Posted by HE117

Originally Posted by ugly

I tried but was unable to incorrectly assemble my Ross bolt, I even fired it with the bolt release in the release position and it seemed to be ok, it was a M1910 Mk3.

Mine is an M10 as well...

The problem with the bolt is a little difficult to describe, but is essentally to do with the rotation of the head. As you will know, you have to rotate the bolt head a quarter turn against it's spring before you can fit it into the gun. The rotation of the head is stopped at the 90degree point by the extractor bar. It is possible to rotate the head further past the bar by forcing the stud in the extractor past the groove in the head. If you do this for another 90 degrees the head will drop back flush with the bolt body. The bolt is then 180 degrees out of alignment and can be fitted to the rifle, in this state it will chamber a round, but the bolt head will not rotate when it enters the breech. The striker will come forward and intiate the round, but the breech is still unlocked and will fail catastrophically.

You have to be quite a determined mong to get this wrong, however as they say...

I toyed around with posting a set of instructions on how to correctly strip and reassemble the bolt, but thought that this may be tempting fate...

Dunno - what do you think..?

Sounds like a massive and potentially fatal safety issue - you could do a lot worse than putting up mong-proof instructions. If someone doesn't lose half their face, you've done a good job.

Originally Posted by Biped

Originally Posted by HE117

Originally Posted by ugly

I tried but was unable to incorrectly assemble my Ross bolt, I even fired it with the bolt release in the release position and it seemed to be ok, it was a M1910 Mk3.

Mine is an M10 as well...

The problem with the bolt is a little difficult to describe, but is essentally to do with the rotation of the head. As you will know, you have to rotate the bolt head a quarter turn against it's spring before you can fit it into the gun. The rotation of the head is stopped at the 90degree point by the extractor bar. It is possible to rotate the head further past the bar by forcing the stud in the extractor past the groove in the head. If you do this for another 90 degrees the head will drop back flush with the bolt body. The bolt is then 180 degrees out of alignment and can be fitted to the rifle, in this state it will chamber a round, but the bolt head will not rotate when it enters the breech. The striker will come forward and intiate the round, but the breech is still unlocked and will fail catastrophically.

You have to be quite a determined mong to get this wrong, however as they say...

I toyed around with posting a set of instructions on how to correctly strip and reassemble the bolt, but thought that this may be tempting fate...

Dunno - what do you think..?

Sounds like a massive and potentially fatal safety issue - you could do a lot worse than putting up mong-proof instructions. If someone doesn't lose half their face, you've done a good job.

OK I will see what I can do, BUT - the acid test is to check for the 1" extention of the bolt head as per my picture. If you have this, you are fine, if not, make sure you have an ample supply of headache pills before pulling the trigger...

Originally Posted by HE117

Originally Posted by Biped

Originally Posted by HE117

Originally Posted by ugly

I tried but was unable to incorrectly assemble my Ross bolt, I even fired it with the bolt release in the release position and it seemed to be ok, it was a M1910 Mk3.

Mine is an M10 as well...

The problem with the bolt is a little difficult to describe, but is essentally to do with the rotation of the head. As you will know, you have to rotate the bolt head a quarter turn against it's spring before you can fit it into the gun. The rotation of the head is stopped at the 90degree point by the extractor bar. It is possible to rotate the head further past the bar by forcing the stud in the extractor past the groove in the head. If you do this for another 90 degrees the head will drop back flush with the bolt body. The bolt is then 180 degrees out of alignment and can be fitted to the rifle, in this state it will chamber a round, but the bolt head will not rotate when it enters the breech. The striker will come forward and intiate the round, but the breech is still unlocked and will fail catastrophically.

You have to be quite a determined mong to get this wrong, however as they say...

I toyed around with posting a set of instructions on how to correctly strip and reassemble the bolt, but thought that this may be tempting fate...

Dunno - what do you think..?

Sounds like a massive and potentially fatal safety issue - you could do a lot worse than putting up mong-proof instructions. If someone doesn't lose half their face, you've done a good job.

OK I will see what I can do, BUT - the acid test is to check for the 1" extention of the bolt head as per my picture. If you have this, you are fine, if not, make sure you have an ample supply of headache pills before pulling the trigger...

I'd suggest you get it issued by one of the organisations so they can be responsible for it.