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Enfield action strength |
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The Armourer ![]() Senior Member ![]() Joined: June 23 2019 Location: Y Felinhelli Status: Offline Points: 1246 |
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It is interesting that when Ishapore produced the 2A (7.62) and they used 'improved steel' they found that during the proof testing that the action warped and the bolt locked up solid. This happened with both the oiled-round and the dry round. When they reverted back to the original steel (as specified for the No1 Mk3) the oiled round still warped the action but the dry-round was OK. They amended the testing to 'drop' the oiled round test but never actually amended the test requirements. This is why the 2A & 2A1 use the same steel as the No1 Mk3. |
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Long branch ![]() Senior Member ![]() Joined: January 08 2014 Location: Georgia, USA Status: Offline Points: 247 |
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I've never heard that. It was always my understanding that the heat treating process was improved.
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The Armourer ![]() Senior Member ![]() Joined: June 23 2019 Location: Y Felinhelli Status: Offline Points: 1246 |
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The old memory is slipping - the article states that with the 'correct'(original) steel the 2A stand up to both the oiled and dry tests. An interesting article : The article covers a host of subjects (and several pages) based around the Indian firearms industry and more specifically the ‘Proof House’, but of particular interest are a couple of paragraphs regarding ‘Enfield’s’. Extract from “Gun Digest 33rd Anniversary 1979 Deluxe Edition” Article Author : Mr A G Harrison Qualification : Former ‘Proof Master’ of the ‘Rifle Factory Proof House, Ishapore, India’ From 1908 to 1950 all military bolt action rifles made at Ishapore were proof tested with a dry-round, followed with by an oiled proof round. The proof cartridge was loaded to 24 tons psi breech pressure, or 15% higher than the service pressure. In 1950 (after the departure, in 1949, of India from British control) the material for the rifle bodies was altered from an EN steel to SWES 48 steel with the recoil shoulder and cam recesses being heat treated. With this change the rifle receivers distorted when oiled proof cartridges were fired. This was discovered when hard and sometimes impossible bolt retraction was experienced. Large quantities of rifles were rejected. To avoid rejections the authorities ordered discontinuance of the oiled proof round. Therefore from 1950 to the end of SMLE production, rifles made at Ishapore were proof tested with one dry proof only, although the specification still called for both dry and oiled proof. All bolts and bolt heads issued as spares were always proofed with a dry proof round only. A bolt action rifle similar to the SMLE MkIII*, modified to fire the 7.62mm NATO cartridge, was produced at Ishapore, first in February 1965. The receivers were made of SWES 48 steel (as per the SMLE MkIII*) and with the NATO proof cartridge the receivers were found to distort with both the dry and oiled proof round. The material was changed back to the EN steel so now the rifles stand up better to dry and oiled proof. After passing proof the barrels are impressed with the Indian national proof stamp. The bolt handles and bolt head claws are struck with the crossed flags only. |
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scottz63 ![]() Senior Member ![]() ![]() Joined: November 08 2021 Location: Mid Mo Status: Offline Points: 829 |
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Very interesting and informative video. Thanks!
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14EH AIT Instructor-PATRIOT Fire Control Enhanced Operator/Maintainer
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