This is a discussion on Difference between 7.62x51 vs 7.62x54 within the Ammunition forums, part of the M14 M1A Forum category; I'm a newby to the M-14 as I just purchased my first M1A NM the other day. I've since been looking for surplus ammo to ...
I'm a newby to the M-14 as I just purchased my first M1A NM the other day. I've since been looking for surplus ammo to do some serious plinking and I'm not sure what the difference is between the 51mm and 54mm other than the obvious. Will both shoot fine in my M1A or only the 54mm. The guy I bought mine from said he has been using the Australian 7.62 F4 surplus and it runs through the rifle like match ammo. Any help would be appreciated.
The case is longer and it very well could result in an out of battery firing and in an extreme case could kill you. At the very least it could seriously mess up your rifle.
Only shoot 7.62x51 NATO or equivilent .308 Winchester ammo in your M1A.
Also before shooting commercial ammo in your M1A do a search on this site to learn what bullet weights and powder burn rates are ok for your rifle. Heavy hunting bullets and either too slow or too fast a powder could over stress your rifle.
Also look at the stickeys at the top of the main page in the ammo section for a list of good shooting surplus ammo and a stickey with where it can be found on the internet.
First, they are NOT the same!! DO NOT attempt to chamber a 7.62x54R round in an M1A or M14 rifle.
The 7,62x51 is the NATO designation for the .308 Winchester round. It was developed to replace the .30-06 (7.62x63) Springfield Model of '06 for the M14 rifle.
The 7.62x54R is the oldest full-power military cartridge still in use today. It was developed in Russian in 1890, for the Model 1891 Mosin-Nagant Rifle. It is a RIMMED case, as opposed to the rimless 7.62x51. Power is approximately the same as the .308. It uses .310" diameter bullets, has a case neck of .340", and an overall length of 2.20".
The 7.62x51 (.308) uses bullet diameters of .308", a case neck diameter of .338", and an overall length of 2.75".
This info came from Barnes 10th Edition of Cartridges of the World.
Stick with non-corrosive 7.62x51 ammo, and you, and your M1A will both enjoy a long, and fulfilling, life.
I'm a newby to the M-14 as I just purchased my first M1A NM the other day. I've since been looking for surplus ammo to do some serious plinking and I'm not sure what the difference is between the 51mm and 54mm other than the obvious. Will both shoot fine in my M1A or only the 54mm. The guy I bought mine from said he has been using the Australian 7.62 F4 surplus and it runs through the rifle like match ammo. Any help would be appreciated. Bill
This is the scores.... 1, M118LR Lake City from 2003. Top score of 200-13X, on a SR-1 NRA standard 100 yard target, 1-20 round mag only with my NM M1A. 2, M118SB Lake City from 1985, a 199-12X.
3, Portuguese m/963 surplus from 1979, a 199-10X.
4, M852 Lake City from 1985, 198-13X. 5, Radway Green surplus from 1985, 198-9X. 6, South African surplus from 1980, 198-6X. 7, Santa Barbra surplus from 1980, 197-14X. 8, Australian MF surplus from 1966, 197-10X. 9, Argentine surplus from 1983, 197-8X. 10, Austria surplus from 1980, 197-6X. 11, Greek surplus from 1980, 197-6X. 12, German DM 41, surplus from 1960, 197-6X. 13, Singapore surplus from 1986, 196-11X. 14, Australian ADI surplus from 1988, 196-8X. 15, Radway Green surplus from 1990, 196-8X. 16, Yugoslavia surplus from 2002, 196-6X. 17, Malaysian surplus from 1983, 194-9X. 18, Lithuanian surplus from 2003, 194-6X. 19, Yugoslavia surplus from 1989, 194-2X. 20, Venezuelan surplus from 1989, 194-2X. 21, Denmark, surplus from 1993, 193-2X. 22, Chilean, surplus from 1976, 191-4X. 23, Portuguese m/963 surplus from 1978, 190-4X. 24, Austria surplus from 1978, 190-3X. 25, Belgium surplus from 1977, 189-7X. 26, South African surplus from 1981, 189-1X. 27, Indonesian surplus from 1985, 187-1X. 28, Pakistan military surplus from 1980. Score of 180-0X only.
Enjoy your M1A with either military surplus ammunition or your own handloads .