OK, now to bring some sanity to this argument. The .308 or 7.62 NATO round came out in around 1952 and 1954 respectively. The SMLE receiver ceased to be newly manufactured with only a couple exceptions in 1948. (the exceptions being a small run of Lithgows in around 1956 and sporadic production in India up until 1986 or so).
The Ishapore 2A/2A1 is the only SMLE pattern receiver ever produced for 7.62 NATO. It was NOT made of the same steel alloy as the SMLE of old.
Put bluntly, the No.4 action can barely withstand a regular diet of 7.62mm. The Brits stopped L8 production shortly after they started it due to the receivers not standing up to the kind of round count you see in the military.
A No.1 action is NOT a safe choice for a conversion to 7.62 or .308. It WILL stretch the receiver after a short time and could fail catastrophically. Not worth the risk IMHO.
The Ishapore 2A/2A1 is the only SMLE pattern receiver ever produced for 7.62 NATO. It was NOT made of the same steel alloy as the SMLE of old.
Put bluntly, the No.4 action can barely withstand a regular diet of 7.62mm. The Brits stopped L8 production shortly after they started it due to the receivers not standing up to the kind of round count you see in the military.
A No.1 action is NOT a safe choice for a conversion to 7.62 or .308. It WILL stretch the receiver after a short time and could fail catastrophically. Not worth the risk IMHO.






























, but apparently the No.4 was stronger in action and thicker in barrel than the SMLE....
...if you watch the E&E here you'll see the No.4 sporters command a higher price than the SMLE sporters for that very reason; the barrel on a sportered SMLE can heat up real quick !......























