Can it be reformed

[TTE]

Can a 300 PRC case be reformed into a usable 375/416 Ruger case?

Heard about this, which might/could be an option for those of us that have big bore Rugers with no available brass.

Thanks for you opinions/expertise.

 

[Just Say Moe]

Asked Al Gore and got this:
https://backfire.tv/maximum-effective-range-rifle/
https://www.longrangehunting.com/threads/300prc-to-375-ruger.327420/

https://www.africahunting.com/threads/375-ruger-conversion-to-416-ruger.82063/
https://forums.outdoorsdirectory.com/threads/300-prc-resized-to-375-ruger.2786040/


Yes, a 300 PRC case can be reformed into a usable 375 Ruger or 416 Ruger case, but the process requires specific steps and considerations.

• The 300 PRC, 375 Ruger, and 416 Ruger all share the same basic case architecture, with differences primarily in neck diameter and length. This makes case conversion feasible within this family

• .Resizing 300 PRC brass to 375 Ruger is a known practice, especially when 375 Ruger brass is difficult to find. The most commonly recommended method is a two-step process: first, expand the neck to .338 caliber, then to .375 caliber, to reduce the risk of splitting the case neck

• .Once resized to 375 Ruger, the same brass can be further necked up to 416 Ruger, as the 375 and 416 Ruger cases are essentially identical except for the neck diameter
  
• .Annealing the case necks before expanding is advised to prevent cracking and ensure smooth resizing

• .After forming, cases should be trimmed to the correct length and checked for proper chamber fit.

In summary, with proper tools and careful annealing and resizing, 300 PRC brass can be converted into usable 375 Ruger or 416 Ruger cases


Lots of references here
.

 

[Hipshoot]

Asked Al Gore and got this:
https://backfire.tv/maximum-effective-range-rifle/
https://www.longrangehunting.com/threads/300prc-to-375-ruger.327420/

https://www.africahunting.com/threads/375-ruger-conversion-to-416-ruger.82063/
https://forums.outdoorsdirectory.com/threads/300-prc-resized-to-375-ruger.2786040/


Yes, a 300 PRC case can be reformed into a usable 375 Ruger or 416 Ruger case, but the process requires specific steps and considerations.

• The 300 PRC, 375 Ruger, and 416 Ruger all share the same basic case architecture, with differences primarily in neck diameter and length. This makes case conversion feasible within this family
• .Resizing 300 PRC brass to 375 Ruger is a known practice, especially when 375 Ruger brass is difficult to find. The most commonly recommended method is a two-step process: first, expand the neck to .338 caliber, then to .375 caliber, to reduce the risk of splitting the case neck
• .Once resized to 375 Ruger, the same brass can be further necked up to 416 Ruger, as the 375 and 416 Ruger cases are essentially identical except for the neck diameter
• .Annealing the case necks before expanding is advised to prevent cracking and ensure smooth resizing
• .After forming, cases should be trimmed to the correct length and checked for proper chamber fit.

In summary, with proper tools and careful annealing and resizing, 300 PRC brass can be converted into usable 375 Ruger or 416 Ruger cases


Lots of references here
.

Had some .416 Ruger brass that I loaded and had some fail to fire (looked like light hits, maybe short headspaced brass) so I necked up a little further with an expander button for a .444 Marlin then sized down (crush fit) with the .416 die and seated the bullet well into the lands---solved the problem!
You might want to do that when you size up the .300 PRC brass.

Hip

 

[TTE]

Had some .416 Ruger brass that I loaded and had some fail to fire (looked like light hits, maybe short headspaced brass) so I necked up a little further with an expander button for a .444 Marlin then sized down (crush fit) with the .416 die and seated the bullet well into the lands---solved the problem!
You might want to do that when you size up the .300 PRC brass.

Hip

Have not done it yet. Was checking if the rumor I heard was plausible. And if it could be done, what equipment/tools/dies would be needed to get it accomplished.

 

[msalm]

Asked Al Gore and got this:
https://backfire.tv/maximum-effective-range-rifle/
https://www.longrangehunting.com/threads/300prc-to-375-ruger.327420/

https://www.africahunting.com/threads/375-ruger-conversion-to-416-ruger.82063/
https://forums.outdoorsdirectory.com/threads/300-prc-resized-to-375-ruger.2786040/


Yes, a 300 PRC case can be reformed into a usable 375 Ruger or 416 Ruger case, but the process requires specific steps and considerations.

• The 300 PRC, 375 Ruger, and 416 Ruger all share the same basic case architecture, with differences primarily in neck diameter and length. This makes case conversion feasible within this family
• .Resizing 300 PRC brass to 375 Ruger is a known practice, especially when 375 Ruger brass is difficult to find. The most commonly recommended method is a two-step process: first, expand the neck to .338 caliber, then to .375 caliber, to reduce the risk of splitting the case neck
• .Once resized to 375 Ruger, the same brass can be further necked up to 416 Ruger, as the 375 and 416 Ruger cases are essentially identical except for the neck diameter
• .Annealing the case necks before expanding is advised to prevent cracking and ensure smooth resizing
• .After forming, cases should be trimmed to the correct length and checked for proper chamber fit.

In summary, with proper tools and careful annealing and resizing, 300 PRC brass can be converted into usable 375 Ruger or 416 Ruger cases


Lots of references here
.

Shoulder location is different enough between 375 and the 300 (.070?) that either jamming bullets or opening necks further (.400 ish) to create a false shoulder is necessary with fire forming. I recently made two fireform inserts for a 12ga single shot for this very thing. Pistol powder and cornmeal to blow the neck out to .400”, then resize in the 375 Ruger fl die and one more firing in insert #2 that blew out the shoulder to size. Ended up working very well.

 

[Hipshoot]

I haven't necked up that far , but I have made .375 H&H Ack.Imp. outa 300 H&H brass. I annealed first and used differant sized expander buttons in my dies to neck up in stages to .375. I love Hornady dies for this due to the fact there expander button is great about $10 ea. inside lube the necks with Imperial Sizing wax.
Jam bullets into the rifleing.
Hip