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Interesting stuff, Larry. I am just getting into learning to reload as I said. Working with vintage rifles as you know.

The Garand is a concern of my brother, as he wants to run factory powder that was used in the era so that there isn't any damage to the operating rod in the gas return system - which can happen too easily if too strong of a load is used. My cousin built this weapon for him made from International Harvester origins. It is in as cherry condition as a rifle possibly could be imagined.

The bullet weight for those rifles was 150gr. According to our local reloading shop owner, who was a Marine Armourer ('Mike'), said that milspec brass is a thicker variety than commercial brass, so the he must use mil brass - or even use Remington brass - to keep pressure in the same range as the original rounds were. As most other commercially made brass is slightly thinner walled and will dissipate some pressure. He also said that either Winchester or CCI primers would be sufficient to keep the ammo in milspec operation. I chose the Hornady 150gr SST for their ballistic stability to give it a better edge.

Since my Springfield is also of vintage origin, there are real concerns too. The original military spec'd rifle was being plagued with bolt/receiver explosions due to over-pressure. The remedy was to drill two relief holes out of the receiver sides opposite of each other to alleviate any possible pressure buildup behind the chanber. So I am loading with IMR 4895 at milspec gr of powder to keep it in spec; but I chose the 165gr SST because it is has the closest weight to the original match rounds (173gr; no longer available) for the Marine sniper rifle. Which is the same rifle I have. Actually have two of these rifles, the other isn't a sporter, but an original Unertl-scoped unit, so all of my rounds are built accordingly.

<blockquote data-quote="Robb" data-source="post: 544116" data-attributes="member: 8446">Interesting stuff, Larry.&nbsp; I am just getting into learning to reload as I said.&nbsp; Working with vintage rifles as you know.The Garand is a concern of my brother, as he wants to run factory powder that was used in the era so that there isn&#039;t any damage to the operating rod in the gas return system - which can happen too easily if too strong of a load is used.&nbsp; My cousin built this weapon for him made from International Harvester origins.&nbsp; It is in as cherry condition as a rifle possibly could be imagined.The bullet weight for those rifles was 150gr.&nbsp; According to our local reloading shop owner, who was a Marine Armourer (&#039;Mike&#039;), said that milspec brass is a thicker variety than commercial brass, so the he must use mil brass - or even use Remington brass - to keep pressure in the same range as the original rounds were.&nbsp; As most other commercially made brass is slightly thinner walled and will dissipate some pressure.&nbsp; He also said that either Winchester or CCI primers would be sufficient to keep the ammo in milspec operation. I chose the Hornady 150gr SST for their ballistic stability to give it a better edge.Since my Springfield is also of vintage origin, there are real concerns too.&nbsp; The original military spec&#039;d rifle was being plagued with bolt/receiver explosions due to over-pressure.&nbsp; The remedy was to drill two relief holes out of the receiver sides opposite of each other to alleviate any possible pressure buildup behind the chanber.&nbsp; So I am loading with IMR 4895 at milspec gr of powder to keep it in spec; but I chose the 165gr SST because it is has the closest weight to the original match rounds (173gr; no longer available) for the Marine sniper rifle.&nbsp; Which is the same rifle I have.&nbsp; Actually have two of these rifles, the other isn&#039;t a sporter, but an original Unertl-scoped unit, so all of my rounds are built accordingly.</blockquote>

[QUOTE="Robb, post: 544116, member: 8446"] Interesting stuff, Larry. I am just getting into learning to reload as I said. Working with vintage rifles as you know. The Garand is a concern of my brother, as he wants to run factory powder that was used in the era so that there isn't any damage to the operating rod in the gas return system - which can happen too easily if too strong of a load is used. My cousin built this weapon for him made from International Harvester origins. It is in as cherry condition as a rifle possibly could be imagined. The bullet weight for those rifles was 150gr. According to our local reloading shop owner, who was a Marine Armourer ('Mike'), said that milspec brass is a thicker variety than commercial brass, so the he must use mil brass - or even use Remington brass - to keep pressure in the same range as the original rounds were. As most other commercially made brass is slightly thinner walled and will dissipate some pressure. He also said that either Winchester or CCI primers would be sufficient to keep the ammo in milspec operation. I chose the Hornady 150gr SST for their ballistic stability to give it a better edge. Since my Springfield is also of vintage origin, there are real concerns too. The original military spec'd rifle was being plagued with bolt/receiver explosions due to over-pressure. The remedy was to drill two relief holes out of the receiver sides opposite of each other to alleviate any possible pressure buildup behind the chanber. So I am loading with IMR 4895 at milspec gr of powder to keep it in spec; but I chose the 165gr SST because it is has the closest weight to the original match rounds (173gr; no longer available) for the Marine sniper rifle. Which is the same rifle I have. Actually have two of these rifles, the other isn't a sporter, but an original Unertl-scoped unit, so all of my rounds are built accordingly. [/QUOTE]

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