FR7 .308 ammo question

The FR-7 and FR-8 rifles were developed during late 1950s in Spain during their transition from military bolt action rifles to new, select-fire CETME Mod.58 assault rifles, chambered for then-new 7.62x51 NATO ammunition. The FR letters stand for "Fusil Refromando", and both FR-7 and FR-8 rifles are conversions of the earlier Mauser type bolt action rifles, which were in abundance at the time because of adoption of new, more effective guns.

The FR-7 rifles were converted from Spanish Model 1916 rifles, which are based on Model 1893 Mauser rifles, also known as "Small ring" Mausers.

The FR-8 rifles were converted from Spanish Model 1943 rifles, which are based on Model 1898 Mauser action, also known as "Large ring" Mauser action.

Conversions included new barrels, inserted spacers in magazines (to accommodate shorter rounds), shortened forends and new iron sights. The FR-7 and FR-8 rifles were issued to Guarda Civil units and also used for military training, as their sighting arrangements and ballistics were intentionally made similar to that of the CETME assault rifle. These rifles were used in Spain until about 1980, when Spanish armed forces began transition to the 5.56mm weapons, and many FR-7 and FR-8 rifles were then sold as surplus.

The FR-8 rifle is a manually operated bolt action rifle. It employs Mauser type rotary bolt with two frontal locking lugs and single rear lug (FR-7 bolt has no rear safety lug), and Mauser-type extractor which provides controlled feed. Cartridges are fed from integral box magazine with 5-round capacity, which can be loaded using stripper clips or loose rounds. Barrel is equipped with muzzle brake / flash hider, which also can be used to launch NATO-standard rifle grenades. The short tube, located below the barrel, has mostly cosmetic purpose, as it serves to provide bayonet mount interface. Its inner space also can be used to store front sight adjustment tool or small cleaning kit. The iron sights consist of adjustable, hooded front sight and combination aperture/V-notch rear sight, which is made in the form of rotating disc. The rear sight disc has V-notch for 100 meters range and three apertures for 200, 300 and 400 meters range. Standard accessories also include rifle slink and a knife-bayonet, similar to that used with CETME Mod.58 assault rifles
 
Also, Spain didn't belong to NATO at the time these conversions were done. The guns are just marked 7.62. Has anybody seen any spanish ammo dated to the 50's and 60's?
 
Also, Spain didn't belong to NATO at the time these conversions were done. The guns are just marked 7.62. Has anybody seen any spanish ammo dated to the 50's and 60's?

I don't have any cases but I have pulled bullets and a cartridge box. The box reads: "CETME CSP-3 Cal. 7,62 mm." The bullets are as long as a typical 168 gr .308" BTHP but they only weigh 113 gr. If you section one you find that the tip is filled with a plastic filler piece. Interestingly, the bullets mike at .313", not .308". Despite the dimensional similarity to 7.62 NATO this is a different cartridge, it is not a 7.62 NATO standard cartridge.

Apparently the reason that Spain didn't use a true 7.62 NATO equivalent cartridge is that the delayed blowback CETME had extraction problems that resulted in bases being torn off the case body so the solution was a lower pressure cartridge.
 
It wouldn't have had to be "rebarrelled". The 7.62 NATO and and the 7.62 CETME rounds are externally pretty much identical. The 7.62 NATO is a 7.62 x 51 case loaded to a particular NATO specification. The 7.62 CETME cartridge is the same case loaded with a lighter bullet (113 gr vs, 147 gr.) and a lower pressure but is not a NATO standard cartridge. Any CETME, FR7 or FR8 will chamber and fire a 7.62 NATO cartridge even though that is not what they were intended to shoot.

Thanks for correcting me on this, I think I miss read the original write up I was reading on the rifle and that lead to my misinformation.
 
Ok I have another question for you all... my son hit me up with this one on the way back from the dentist today (given he had been sedated for the procedure I don't know how he came up with this) but he asked me if the fr8 could be rebarreled to 7mm-08 which I don't see why it couldn't from an action stand point (if memory serves me the 7mm-08 is based on the 308 cartridge) but I am not sure about the rifle handling the pressure for that caliber.
 
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