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| Headspace & Bolt Heads http://www.yesterdaysweapons.com/phpBB3/viewtopic.php?f=23&t=7234 |
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| Author: | Et2ss [ Sat Jan 03, 2009 7:25 pm ] |
| Post subject: | Headspace & Bolt Heads |
Now I know how the No.4 heads are numbered, but what about the No.1 boltheads? OKC came here with a 1918 B.S.A. that he was told had headspace problems. I couldn't make out any definite number on it though. How do you solve the headspace problem on the No. 1? Thanks |
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| Author: | Amatikulu [ Sat Jan 03, 2009 8:11 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
The No.1 bolt heads do not have numbers that size them. If the bolt body has a matching serial number to the receiver, the best bet is to simply measure the existing bolthead with a micrometer and find a longer one. E-bay used to often have No.1 boltheads and they were described with the length. Remember - SAAMI specs are more stringent than British Military specs. British specs for a field gauge were 0.074" (SAAMI is 0.067"). I check my rifles with a 0.074" gauge only. If the bolt body does not hav a matching serial number, you can switch bolt bodies to find a longer one. Finally, if you can't get it into spec by these methods, the receiver needs a new barrel. |
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| Author: | Et2ss [ Sat Jan 03, 2009 8:33 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
Well this one was a neat rifle that seemed to be fully restorable. It had the stock cut down but the metal was un-harmed. It had a 'ramp' on the front sight that appeared to be a slip over on the original base, then it was held on by the blade. I think King Cole will post pictures of this later on. It certainly looked pretty neat. |
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| Author: | old king cole [ Sun Jan 04, 2009 12:50 am ] |
| Post subject: | Re: Headspace & Bolt Heads |
My dad said someone gave him this enfield around 40 yrs ago and he has only shot it a few times . He said he would love to shoot it again but has the headspace issue. I told him I would go to Bruce and some of you on here to point us in the right direction to make it happen. Here's some pics        
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| Author: | Amatikulu [ Sun Jan 04, 2009 9:34 am ] |
| Post subject: | Re: Headspace & Bolt Heads |
Old King Cole - How do you know it has a headspace problem? Please read this thread in its entirety it's the best explanation of headspace and the Lee Enfield that I've found on the net. This gives a very practical approach to how problematic (or not) excess headspace is in a Lee Enfield. |
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| Author: | Et2ss [ Sun Jan 04, 2009 10:52 am ] |
| Post subject: | Re: Headspace & Bolt Heads |
Great Info ! I know I told him I would give it a test fire then check the cases for signs of excessive head space beforeI would relegate it to hanging on the wall. What do you make of the front sight 'ramp' ? Ever seen anything like this? Also if you can Brian, try to get pics of the markings on the knoxform & receiver |
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| Author: | Amatikulu [ Sun Jan 04, 2009 11:15 am ] |
| Post subject: | Re: Headspace & Bolt Heads |
The front sight ramp is obviously not original but from the pictures looks like it simply fits over the original front sight base. If I'm correct, it's probably held in place by friction and all you need to do is remove the front sight blade and thenpry off the ramp revealing the original front sight base and allowing a restoration. |
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| Author: | Et2ss [ Sun Jan 04, 2009 12:50 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
That is what I thought, I just wondered if you had seen one like this before? This rifle had Brit proofs all over it & thought it might have been sold out of service. Maybe a Brit 'ramp' too? Dunno the numbers on it look odd not like US stuff |
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| Author: | old king cole [ Sun Jan 04, 2009 1:11 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
My just called my dad and he told me that the time he shot it the case had a ring around it like it was about to pull itself apart and it had a thin line/crack like shown in the pics so he's sure that's what it is. I'll edit above and add a few more pics of the markings |
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| Author: | Amatikulu [ Sun Jan 04, 2009 2:29 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
I have no clue on the front site ramp - must be commercial, looks like "pat pending" maybe Parker Hale or someone like that. Looking at the pictures, the rifle was rebarreled at Enfield in 1940. The butt stock has a weird cartouche that might be a Siamese Tiger - not sure as it stoo indistinct. |
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| Author: | Gun Nut [ Sun Jan 04, 2009 2:38 pm ] |
| Post subject: | Re: Headspace & Bolt Heads |
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